drm/bridge/sii8620: fix MSC message removal

Messages queue can be cleaned up by message callbacks, to avoid repeated
removal of current message it should be removed from the queue before
calling these callbacks.
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1485935272-17337-12-git-send-email-a.hajda@samsung.com

drivers/gpu/drm/bridge/sil-sii8620.c

@@ -272,11 +272,11 @@ static void sii8620_mt_work(struct sii8620 *ctx)
 		ctx->mt_state = MT_STATE_READY;
 		msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg,
 				       node);
+		list_del(&msg->node);
 		if (msg->recv)
 			msg->recv(ctx, msg);
 		if (msg->continuation)
 			msg->continuation(ctx, msg->ret);
-		list_del(&msg->node);
 		kfree(msg);
 	}