rds: send: Fix dead code in rds_sendmsg

Currently, code at label *out* is unreachable. Fix this by updating
variable *ret* with -EINVAL, so the jump to *out* can be properly
executed instead of directly returning from function.

Addresses-Coverity-ID: 1472059 ("Structurally dead code")
Fixes: 1e2b44e78eea ("rds: Enable RDS IPv6 support")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/send.c

@@ -1126,7 +1126,7 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
 				if (addr4 == htonl(INADDR_ANY) ||
 				    addr4 == htonl(INADDR_BROADCAST) ||
 				    IN_MULTICAST(ntohl(addr4))) {
-					return -EINVAL;
+					ret = -EINVAL;
 					goto out;
 				}
 			}