[PATCH -next v3] drm/bridge: fix -Wunused-const-variable= warning

[Zhu Wang <wangzhu9@huawei.com>]

When building with W=1, the following warning occurs.

drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:48:17: warning: ‘anx781x_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx781x_i2c_addresses[] = {
                 ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:40:17: warning: ‘anx7808_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx7808_i2c_addresses[] = {

When CONFIG_IO is disabled, above two variables are not used,
since the place where it is used is inclueded in the macro
CONFIG_OF.

Even for drivers that do not depend on CONFIG_OF, it's almost
always better to leave out the of_match_ptr(), since the only
thing it can possibly do is to save a few bytes of .text if a
driver can be used both with and without it. Hence we remove
all of_match_ptr() used in other places.

Fixes: 0647e7dd3f7a ("drm/bridge: Add Analogix anx78xx support")
Signed-off-by: Zhu Wang <wangzhu9@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

---
Changes in v3
- update the commit message, of_match_ptr is useless since it can
  only save a few bytes in .text segment, even if the drivers do
  not depend on CONFIG_OF.

---
Changes in v2
- remove CONFIG_OF and of_match_ptr in following files:
  drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
  drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
  drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
  drivers/gpu/drm/bridge/chrontel-ch7033.c
  drivers/gpu/drm/bridge/sil-sii8620.c
  drivers/gpu/drm/bridge/ti-tfp410.c
---
 drivers/gpu/drm/bridge/analogix/analogix-anx6345.c  | 2 +-
 drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c  | 4 +---
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 2 +-
 drivers/gpu/drm/bridge/chrontel-ch7033.c            | 2 +-
 drivers/gpu/drm/bridge/sil-sii8620.c                | 2 +-
 drivers/gpu/drm/bridge/ti-tfp410.c                  | 2 +-
 6 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
index 72ab2ab77081..c9e35731e6a1 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
@@ -813,7 +813,7 @@ MODULE_DEVICE_TABLE(of, anx6345_match_table);
 static struct i2c_driver anx6345_driver = {
 	.driver = {
 		   .name = "anx6345",
-		   .of_match_table = of_match_ptr(anx6345_match_table),
+		   .of_match_table = anx6345_match_table,
 		  },
 	.probe = anx6345_i2c_probe,
 	.remove = anx6345_i2c_remove,
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
index 06a3e3243e19..800555aef97f 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
@@ -1373,7 +1373,6 @@ static const struct i2c_device_id anx78xx_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, anx78xx_id);
 
-#if IS_ENABLED(CONFIG_OF)
 static const struct of_device_id anx78xx_match_table[] = {
 	{ .compatible = "analogix,anx7808", .data = anx7808_i2c_addresses },
 	{ .compatible = "analogix,anx7812", .data = anx781x_i2c_addresses },
@@ -1382,12 +1381,11 @@ static const struct of_device_id anx78xx_match_table[] = {
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, anx78xx_match_table);
-#endif
 
 static struct i2c_driver anx78xx_driver = {
 	.driver = {
 		   .name = "anx7814",
-		   .of_match_table = of_match_ptr(anx78xx_match_table),
+		   .of_match_table = anx78xx_match_table,
 		  },
 	.probe = anx78xx_i2c_probe,
 	.remove = anx78xx_i2c_remove,
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index 0ff51f945fb0..6af565ac307a 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2655,7 +2655,7 @@ MODULE_DEVICE_TABLE(of, mhdp_ids);
 static struct platform_driver mhdp_driver = {
 	.driver	= {
 		.name		= "cdns-mhdp8546",
-		.of_match_table	= of_match_ptr(mhdp_ids),
+		.of_match_table	= mhdp_ids,
 	},
 	.probe	= cdns_mhdp_probe,
 	.remove	= cdns_mhdp_remove,
diff --git a/drivers/gpu/drm/bridge/chrontel-ch7033.c b/drivers/gpu/drm/bridge/chrontel-ch7033.c
index a854eb84e399..483c28c7fc99 100644
--- a/drivers/gpu/drm/bridge/chrontel-ch7033.c
+++ b/drivers/gpu/drm/bridge/chrontel-ch7033.c
@@ -607,7 +607,7 @@ static struct i2c_driver ch7033_driver = {
 	.remove = ch7033_remove,
 	.driver = {
 		.name = "ch7033",
-		.of_match_table = of_match_ptr(ch7033_dt_ids),
+		.of_match_table = ch7033_dt_ids,
 	},
 	.id_table = ch7033_ids,
 };
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 79b09ccd1353..599164e3877d 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -2376,7 +2376,7 @@ MODULE_DEVICE_TABLE(i2c, sii8620_id);
 static struct i2c_driver sii8620_driver = {
 	.driver = {
 		.name	= "sii8620",
-		.of_match_table = of_match_ptr(sii8620_dt_match),
+		.of_match_table = sii8620_dt_match,
 	},
 	.probe		= sii8620_probe,
 	.remove		= sii8620_remove,
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 22b07260a78e..28848a8eb42e 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -448,7 +448,7 @@ MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids);
 static struct i2c_driver tfp410_i2c_driver = {
 	.driver = {
 		.name	= "tfp410",
-		.of_match_table = of_match_ptr(tfp410_match),
+		.of_match_table = tfp410_match,
 	},
 	.id_table	= tfp410_i2c_ids,
 	.probe		= tfp410_i2c_probe,
-- 
2.17.1