NLM: Remove unused argument from svc_addsock() function

Clean up: The svc_addsock() function no longer uses its "proto"
argument, so remove it.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index f91377c..95293f5 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1167,8 +1167,7 @@
 
 int svc_addsock(struct svc_serv *serv,
 		int fd,
-		char *name_return,
-		int *proto)
+		char *name_return)
 {
 	int err = 0;
 	struct socket *so = sockfd_lookup(fd, &err);
@@ -1203,7 +1202,6 @@
 		sockfd_put(so);
 		return err;
 	}
-	if (proto) *proto = so->sk->sk_protocol;
 	return one_sock_name(name_return, svsk);
 }
 EXPORT_SYMBOL_GPL(svc_addsock);