rpc: fix gss_svc_init cleanup on failure

The failure case here should be rare, but it's obviously wrong.
Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>

net/sunrpc/auth_gss/svcauth_gss.c

@@ -1980,7 +1980,7 @@ gss_svc_init_net(struct net *net)
 		goto out2;
 	return 0;
 out2:
-	destroy_use_gss_proxy_proc_entry(net);
+	rsi_cache_destroy_net(net);
 out1:
 	rsc_cache_destroy_net(net);
 	return rv;