drm/i915: Remove the drm_dbg() from the vblank evade critical section

We are inside the vblank evade critical section here, racing
against the raster beam. There is no time to print debug
messages.

Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Juston Li <juston.li@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006235704.28894-4-ville.syrjala@linux.intel.comReviewed-by: Juston Li <juston.li@intel.com>

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

@@ -1018,8 +1018,6 @@ static void intel_load_plane_csc_black(struct intel_plane *intel_plane)
 	enum plane_id plane = intel_plane->id;
 	u16 postoff = 0;
 
-	drm_dbg_kms(&dev_priv->drm, "plane color CTM to black  %s:%d\n",
-		    intel_plane->base.name, plane);
 	intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 0), 0);
 	intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 1), 0);