drm/i915: Fix the incorrect cursor A bit definition in DSPFW2 register

Signed-off-by: NZhao Yakui <yakui.zhao@intel.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NEric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/i915_reg.h

@@ -1815,7 +1815,7 @@
 #define   DSPFW_PLANEB_SHIFT	8
 #define DSPFW2			0x70038
 #define   DSPFW_CURSORA_MASK	0x00003f00
-#define   DSPFW_CURSORA_SHIFT	16
+#define   DSPFW_CURSORA_SHIFT	8
 #define DSPFW3			0x7003c
 #define   DSPFW_HPLL_SR_EN	(1<<31)
 #define   DSPFW_CURSOR_SR_SHIFT	24