drm/atomic-helper: Drop unneeded argument from check_pending_encoder

Just a remnant from an old iteration of this patch that I've forgotten
to remove: We only need the encoder to figure out whether it has been
reassigned in this update already or not to figure out whether there's
a conflict or not.

Reported-by: Thierry Reding <thierry.reding@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449564561-3896-2-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/drm_atomic_helper.c

@@ -88,8 +88,7 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
 
 static bool
 check_pending_encoder_assignment(struct drm_atomic_state *state,
-				 struct drm_encoder *new_encoder,
-				 struct drm_connector *new_connector)
+				 struct drm_encoder *new_encoder)
 {
 	struct drm_connector *connector;
 	struct drm_connector_state *conn_state;
@@ -257,7 +256,7 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
 		return 0;
 	}
 
-	if (!check_pending_encoder_assignment(state, new_encoder, connector)) {
+	if (!check_pending_encoder_assignment(state, new_encoder)) {
 		DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n",
 				 connector->base.id,
 				 connector->name);