drm/amd/display: Remove redundant condition.

You cannot have modeset and flip in the same call for
same CRTC, in such case it will be set mode and set plane,
not a flip.

Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c

@@ -3115,15 +3115,9 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 			action = get_dm_commit_action(crtc->state);
 
-			/* Surfaces are created under two scenarios:
-			 * 1. This commit is not a page flip.
-			 * 2. This commit is a page flip, and streams are created.
-			 */
 			crtc_state = drm_atomic_get_crtc_state(state, crtc);
 			pflip_needed = !state->allow_modeset;
-			if (!pflip_needed ||
-				action == DM_COMMIT_ACTION_DPMS_ON ||
-				action == DM_COMMIT_ACTION_SET) {
+			if (!pflip_needed) {
 				struct dc_surface *surface;
 
 				list_for_each_entry(connector,