NFSv4: Don't use cred->cr_ops->cr_name in nfs4_proc_setclientid()

With the recent change to generic creds, we can no longer use
cred->cr_ops->cr_name to distinguish between RPCSEC_GSS principals and
AUTH_SYS/AUTH_NULL identities. Replace it with the rpc_authops->au_name
instead...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/auth_generic.c

@@ -136,9 +136,7 @@ static struct rpc_cred_cache generic_cred_cache = {
 
 static const struct rpc_authops generic_auth_ops = {
 	.owner = THIS_MODULE,
-#ifdef RPC_DEBUG
 	.au_name = "Generic",
-#endif
 	.lookup_cred = generic_lookup_cred,
 	.crcreate = generic_create_cred,
 };