udp: Remove unlikely() from IS_ERR*() condition

"unlikely(IS_ERR_OR_NULL(x))" is excessive. IS_ERR_OR_NULL() already uses
unlikely() internally.

Signed-off-by: Denis Efremov <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: Joe Perches <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: [e-mail]
Signed-off-by: David S. Miller <[e-mail]>

include/net/udp.h

···
 	 * CB fragment
 	 */
 	segs = __skb_gso_segment(skb, features, false);
-	if (unlikely(IS_ERR_OR_NULL(segs))) {
+	if (IS_ERR_OR_NULL(segs)) {
 		int segs_nr = skb_shinfo(skb)->gso_segs;
 
 		atomic_add(segs_nr, &sk->sk_drops);