net: qrtr: ns: Return 0 if server port is not present

When a 'DEL_CLIENT' message is received from the remote, the corresponding
server port gets deleted. A DEL_SERVER message is then announced for this
server. As part of handling the subsequent DEL_SERVER message, the name-
server attempts to delete the server port which results in a '-ENOENT' error.
The return value from server_del() is then propagated back to qrtr_ns_worker,
causing excessive error prints.
To address this, return 0 from control_cmd_del_server() without checking the
return value of server_del(), since the above scenario is not an error case
and hence server_del() doesn't have any other error return value.

Signed-off-by: Sarannya Sasikumar <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/qrtr/ns.c

···
 	if (!node)
 		return -ENOENT;
 
-	return server_del(node, port, true);
+	server_del(node, port, true);
+
+	return 0;
 }
 
 static int ctrl_cmd_new_lookup(struct sockaddr_qrtr *from,