V4L/DVB (9730): cx18: Quiet a sometimes common warning that often has benign consequences

cx18: Quiet a sometimes common warning that often has benign consequences.
No one probably cares that the firmware took forever to ack our command, as
they always seem to succeed whether or not the firmware acks it in a reasonable
amount of time.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-mailbox.c

@@ -557,7 +557,7 @@ static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
 	if (ret == 0) {
 		/* Timed out */
 		mutex_unlock(mb_lock);
-		CX18_WARN("sending %s timed out waiting %d msecs for RPU "
+		CX18_DEBUG_WARN("sending %s timed out waiting %d msecs for RPU "
 				"acknowledgement\n",
 				info->name, jiffies_to_msecs(timeout));
 		return -EINVAL;