drm/i915/dsi: Grab the crtc from the customary place

The encoder hooks already get passed the crtc state so just
grab the crtc from there instead of from the connector state.
This is generally what everyone else does, so no reason for
icl_dsi.c to be different.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230608203057.23759-13-ville.syrjala@linux.intel.com

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

@@ -1243,7 +1243,7 @@ static void gen11_dsi_enable(struct intel_atomic_state *state,
 			     const struct drm_connector_state *conn_state)
 {
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
-	struct intel_crtc *crtc = to_intel_crtc(conn_state->crtc);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 
 	drm_WARN_ON(state->base.dev, crtc_state->has_pch_encoder);
 
@@ -1403,7 +1403,7 @@ static void gen11_dsi_post_disable(struct intel_atomic_state *state,
 				   const struct drm_connector_state *old_conn_state)
 {
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
-	struct intel_crtc *crtc = to_intel_crtc(old_conn_state->crtc);
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 
 	intel_crtc_vblank_off(old_crtc_state);