net: return operator cleanup

Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 43040e9..d87c22d 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -565,12 +565,12 @@
 
 static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
 {
-	return (proto == IPSEC_PROTO_ANY ? 0 : proto);
+	return proto == IPSEC_PROTO_ANY ? 0 : proto;
 }
 
 static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
 {
-	return (proto ? proto : IPSEC_PROTO_ANY);
+	return proto ? proto : IPSEC_PROTO_ANY;
 }
 
 static inline int pfkey_sockaddr_len(sa_family_t family)