[PATCH] powerpc/powernv: fix a W=1 compilation warning

[Qian Cai <cai@lca.pw>]

The commit b575c731fe58 ("powerpc/powernv/npu: Add set/unset window
helpers") called pnv_npu_set_window() in a void function
pnv_npu_dma_set_32(), but the return code from pnv_npu_set_window() has
no use there as all the error logging happen in pnv_npu_set_window(),
so just remove the unused variable to avoid a compilation warning,

arch/powerpc/platforms/powernv/npu-dma.c: In function
'pnv_npu_dma_set_32':
arch/powerpc/platforms/powernv/npu-dma.c:198:10: warning: variable ‘rc’
set but not used [-Wunused-but-set-variable]

Signed-off-by: Qian Cai <cai@lca.pw>
---
 arch/powerpc/platforms/powernv/npu-dma.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c
index 495550432f3d..035208ed591f 100644
--- a/arch/powerpc/platforms/powernv/npu-dma.c
+++ b/arch/powerpc/platforms/powernv/npu-dma.c
@@ -195,7 +195,6 @@ static void pnv_npu_dma_set_32(struct pnv_ioda_pe *npe)
 {
 	struct pci_dev *gpdev;
 	struct pnv_ioda_pe *gpe;
-	int64_t rc;
 
 	/*
 	 * Find the assoicated PCI devices and get the dma window
@@ -208,8 +207,8 @@ static void pnv_npu_dma_set_32(struct pnv_ioda_pe *npe)
 	if (!gpe)
 		return;
 
-	rc = pnv_npu_set_window(&npe->table_group, 0,
-			gpe->table_group.tables[0]);
+	pnv_npu_set_window(&npe->table_group, 0,
+			   gpe->table_group.tables[0]);
 
 	/*
 	 * NVLink devices use the same TCE table configuration as
-- 
1.8.3.1