drm/logicvc: Switch to drm_atomic_get_new_crtc_state()

The logicvc atomic_check implementation uses the deprecated
drm_atomic_get_existing_crtc_state() helper.

This hook is called as part of the global atomic_check, thus before the
states are swapped. The existing state thus points to the new state, and
we can use drm_atomic_get_new_crtc_state() instead.

Reviewed-by: Ville Syrjälä <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Maxime Ripard <[e-mail]>

drivers/gpu/drm/logicvc/logicvc_layer.c

···
 	if (!new_state->crtc)
 		return 0;
 
-	crtc_state = drm_atomic_get_existing_crtc_state(new_state->state,
-							new_state->crtc);
+	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
+						   new_state->crtc);
 	if (WARN_ON(!crtc_state))
 		return -EINVAL;