Always delete entry from list in drm_queue_handler

We left entries without a handler hook in the list, so the list could
keep taking longer to process and use up more memory.

src/amdgpu_drm_queue.c

@@ -82,7 +82,7 @@ amdgpu_drm_queue_handler(struct xorg_list *signalled, unsigned int frame,
 	xorg_list_for_each_entry_safe(e, tmp, &amdgpu_drm_queue, list) {
 		if (e->seq == seq) {
 			if (!e->handler) {
-				e->abort(e->crtc, e->data);
+				amdgpu_drm_queue_handle_one(e);
 				break;
 			}