drm/i915: Remove garbage WARNs

These things can never happen, and probably we'd have oopsed long ago
if they did. Just get rid of this pointless noise in the code.

Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200225171125.28885-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/intel_pm.c

@@ -4460,14 +4460,10 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
 				 u64 *plane_data_rate,
 				 u64 *uv_plane_data_rate)
 {
-	struct drm_atomic_state *state = crtc_state->uapi.state;
 	struct intel_plane *plane;
 	const struct intel_plane_state *plane_state;
 	u64 total_data_rate = 0;
 
-	if (WARN_ON(!state))
-		return 0;
-
 	/* Calculate and cache data rate for each plane */
 	intel_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) {
 		enum plane_id plane_id = plane->id;
@@ -4495,9 +4491,6 @@ icl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
 	const struct intel_plane_state *plane_state;
 	u64 total_data_rate = 0;
 
-	if (WARN_ON(!crtc_state->uapi.state))
-		return 0;
-
 	/* Calculate and cache data rate for each plane */
 	intel_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) {
 		enum plane_id plane_id = plane->id;
@@ -4538,7 +4531,6 @@ icl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
 static int
 skl_allocate_pipe_ddb(struct intel_crtc_state *crtc_state)
 {
-	struct drm_atomic_state *state = crtc_state->uapi.state;
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct skl_ddb_entry *alloc = &crtc_state->wm.skl.ddb;
@@ -4557,9 +4549,6 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *crtc_state)
 	memset(crtc_state->wm.skl.plane_ddb_y, 0, sizeof(crtc_state->wm.skl.plane_ddb_y));
 	memset(crtc_state->wm.skl.plane_ddb_uv, 0, sizeof(crtc_state->wm.skl.plane_ddb_uv));
 
-	if (drm_WARN_ON(&dev_priv->drm, !state))
-		return 0;
-
 	if (!crtc_state->hw.active) {
 		alloc->start = alloc->end = 0;
 		return 0;