drm/i915: Eliminate crtc->state usage from intel_atomic_commit_tail and .crtc_update()

We already have the correct new crtc state so just use that instead of
crtc->state.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170823152226.22938-7-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -12281,7 +12281,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
 			unsigned int cmask = drm_crtc_mask(crtc);
 
 			intel_crtc = to_intel_crtc(crtc);
-			cstate = to_intel_crtc_state(crtc->state);
+			cstate = to_intel_crtc_state(new_crtc_state);
 			pipe = intel_crtc->pipe;
 
 			if (updated & cmask || !cstate->base.active)
@@ -12410,7 +12410,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 			intel_check_cpu_fifo_underruns(dev_priv);
 			intel_check_pch_fifo_underruns(dev_priv);
 
-			if (!crtc->state->active) {
+			if (!new_crtc_state->active) {
 				/*
 				 * Make sure we don't call initial_watermarks
 				 * for ILK-style watermark updates.
@@ -12419,7 +12419,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 				 */
 				if (INTEL_GEN(dev_priv) >= 9)
 					dev_priv->display.initial_watermarks(intel_state,
-									     to_intel_crtc_state(crtc->state));
+									     to_intel_crtc_state(new_crtc_state));
 			}
 		}
 	}