NFSD: nfserrno(-ENOMEM) is nfserr_jukebox

[ Upstream commit bb4d8427 ]

Suggested-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>