drm/vc4: Fix the name of the VSYNCD_EVEN register.

It's used for delaying vsync in interlaced mode.

Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/vc4/vc4_regs.h b/drivers/gpu/drm/vc4/vc4_regs.h
index 85c36d2..d529665 100644
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -187,7 +187,7 @@
 # define PV_VCONTROL_CONTINUOUS			BIT(1)
 # define PV_VCONTROL_VIDEN			BIT(0)
 
-#define PV_VSYNCD				0x08
+#define PV_VSYNCD_EVEN				0x08
 
 #define PV_HORZA				0x0c
 # define PV_HORZA_HBP_MASK			VC4_MASK(31, 16)