drm/amdgpu: Fix connector atomic_check compilation fail

I missed amdgpu in my connnector_helper_funcs->atomic_check conversion,
which is understandably causing compilation failures.

Fixes: 6f3b627 ("drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state")
Cc: Daniel Vetter <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: Ben Skeggs <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Kieran Bingham <[email protected]>
Cc: Eric Anholt <[email protected]>
Cc: Laurent Pinchart <[email protected]> [for rcar lvds]
Cc: Sean Paul <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Lyude Paul <[email protected]>
Cc: Karol Herbst <[email protected]>
Cc: Ilia Mirkin <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Reported-by: Chris Wilson <[email protected]>
Signed-off-by: Sean Paul <[email protected]>
Signed-off-by: Maarten Lankhorst <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: atseanpaul

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

@@ -3953,9 +3953,10 @@ is_hdr_metadata_different(const struct drm_connector_state *old_state,
 
 static int
 amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
-				 struct drm_connector_state *new_con_state)
+				 struct drm_atomic_state *state)
 {
-	struct drm_atomic_state *state = new_con_state->state;
+	struct drm_connector_state *new_con_state =
+		drm_atomic_get_new_connector_state(state, conn);
 	struct drm_connector_state *old_con_state =
 		drm_atomic_get_old_connector_state(state, conn);
 	struct drm_crtc *crtc = new_con_state->crtc;