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/include/net/sctp/structs.h b/include/net/sctp/structs.h
index f9e7473..69fef4f 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -847,7 +847,7 @@
 
 static inline int sctp_packet_empty(struct sctp_packet *packet)
 {
-	return (packet->size == packet->overhead);
+	return packet->size == packet->overhead;
 }
 
 /* This represents a remote transport address.