drm/i915: Rename PLANE_CUS_CTL Y plane bits

Rename the PLANE_CUS_CTL Y plane selection bits to actually
say "Y plane".
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211201152552.7821-6-ville.syrjala@linux.intel.comReviewed-by: José Roberto de Souza <jose.souza@intel.com>

drivers/gpu/drm/i915/display/intel_display.c

@@ -5167,13 +5167,13 @@ static int icl_check_nv12_planes(struct intel_crtc_state *crtc_state)
 
 		if (icl_is_hdr_plane(dev_priv, plane->id)) {
 			if (linked->id == PLANE_SPRITE5)
-				plane_state->cus_ctl |= PLANE_CUS_PLANE_7;
+				plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_7_ICL;
 			else if (linked->id == PLANE_SPRITE4)
-				plane_state->cus_ctl |= PLANE_CUS_PLANE_6;
+				plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_6_ICL;
 			else if (linked->id == PLANE_SPRITE3)
-				plane_state->cus_ctl |= PLANE_CUS_PLANE_5_RKL;
+				plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_5_RKL;
 			else if (linked->id == PLANE_SPRITE2)
-				plane_state->cus_ctl |= PLANE_CUS_PLANE_4_RKL;
+				plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_4_RKL;
 			else
 				MISSING_CASE(linked->id);
 		}

drivers/gpu/drm/i915/i915_reg.h

@@ -7254,10 +7254,10 @@ enum {
 #define _PLANE_CUS_CTL_1_A			0x701c8
 #define _PLANE_CUS_CTL_2_A			0x702c8
 #define  PLANE_CUS_ENABLE			(1 << 31)
-#define  PLANE_CUS_PLANE_4_RKL			(0 << 30)
-#define  PLANE_CUS_PLANE_5_RKL			(1 << 30)
-#define  PLANE_CUS_PLANE_6			(0 << 30)
-#define  PLANE_CUS_PLANE_7			(1 << 30)
+#define  PLANE_CUS_Y_PLANE_4_RKL		(0 << 30)
+#define  PLANE_CUS_Y_PLANE_5_RKL		(1 << 30)
+#define  PLANE_CUS_Y_PLANE_6_ICL		(0 << 30)
+#define  PLANE_CUS_Y_PLANE_7_ICL		(1 << 30)
 #define  PLANE_CUS_HPHASE_SIGN_NEGATIVE		(1 << 19)
 #define  PLANE_CUS_HPHASE_0			(0 << 16)
 #define  PLANE_CUS_HPHASE_0_25			(1 << 16)