netlink: simplify nfnetlink_bind

Remove duplicity and simplify code flow by moving the rcu_read_unlock() above
the condition and let the flow control exit naturally at the end of the
function.
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nfnetlink.c

@@ -407,12 +407,9 @@ static void nfnetlink_bind(int group)
 
 	rcu_read_lock();
 	ss = nfnetlink_get_subsys(type);
-	if (!ss) {
 	rcu_read_unlock();
+	if (!ss)
 		request_module("nfnetlink-subsys-%d", type);
-		return;
-	}
-	rcu_read_unlock();
 }
 #endif