The Acer Aspire 5734Z uses bit #29 instead of bit #28 to indicate that
the panel backlight brightness is inverted. Assign it to the related
quirk.

Signed-off-by: Carsten Emde <C.Emde@osadl.org>

---
 drivers/gpu/drm/i915/intel_display.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-tip/drivers/gpu/drm/i915/intel_display.c
===================================================================
--- linux-tip.orig/drivers/gpu/drm/i915/intel_display.c
+++ linux-tip/drivers/gpu/drm/i915/intel_display.c
@@ -9143,6 +9143,12 @@ struct intel_quirk intel_quirks[] = {
 
 	/* Sony Vaio Y cannot use SSC on LVDS */
 	{ 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
+
+	/*
+	 * Acer Aspire 5734Z uses an alternate bit to indicate
+	 * panel backlight brightness inversion
+	 */
+	{ 0x2a42, 0x1025, 0x0459, quirk_alt_bit_for_brightness_inversion },
 };
 
 static void intel_init_quirks(struct drm_device *dev)