media: stk1160: Fixed high volume of stk1160_dbg messages

The function stk1160_dbg gets called too many times, which causes
the output to get flooded with messages. Since stk1160_dbg uses
printk, it is now replaced with printk_ratelimited.
Suggested-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Ghanshyam Agrawal <ghanshyam1898@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/usb/stk1160/stk1160-video.c

@@ -107,8 +107,7 @@ void stk1160_copy_video(struct stk1160 *dev, u8 *src, int len)
 
 	/*
 	 * TODO: These stk1160_dbg are very spammy!
-	 * We should 1) check why we are getting them
-	 * and 2) add ratelimit.
+	 * We should check why we are getting them.
 	 *
 	 * UPDATE: One of the reasons (the only one?) for getting these
 	 * is incorrect standard (mismatch between expected and configured).
@@ -151,7 +150,7 @@ void stk1160_copy_video(struct stk1160 *dev, u8 *src, int len)
 
 	/* Let the bug hunt begin! sanity checks! */
 	if (lencopy < 0) {
-		stk1160_dbg("copy skipped: negative lencopy\n");
+		printk_ratelimited(KERN_DEBUG "copy skipped: negative lencopy\n");
 		return;
 	}