af_ieee802154: setsockopt optlen arg isn't __user

Remove __user annotation from optlen arg as it's bogus.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

net/ieee802154/dgram.c

@@ -414,7 +414,7 @@ static int dgram_getsockopt(struct sock *sk, int level, int optname,
 }
 
 static int dgram_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, int __user optlen)
+		    char __user *optval, int optlen)
 {
 	struct dgram_sock *ro = dgram_sk(sk);
 	int val;

net/ieee802154/raw.c

@@ -244,7 +244,7 @@ static int raw_getsockopt(struct sock *sk, int level, int optname,
 }
 
 static int raw_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, int __user optlen)
+		    char __user *optval, int optlen)
 {
 	return -EOPNOTSUPP;
 }