drm/i915: Remove leftover cnl SAGV block time

GLK doesn't support SAGV, so with CNL gone there is no
use for having a DISPLAY_VER==10 SAGV block time in the code.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220308173230.4182-2-ville.syrjala@linux.intel.comReviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>

drivers/gpu/drm/i915/intel_pm.c

@@ -3689,9 +3689,6 @@ skl_setup_sagv_block_time(struct drm_i915_private *dev_priv)
 	} else if (DISPLAY_VER(dev_priv) == 11) {
 		dev_priv->sagv_block_time_us = 10;
 		return;
-	} else if (DISPLAY_VER(dev_priv) == 10) {
-		dev_priv->sagv_block_time_us = 20;
-		return;
 	} else if (DISPLAY_VER(dev_priv) == 9) {
 		dev_priv->sagv_block_time_us = 30;
 		return;