NFSD: Update the MKNOD3args decoder to use struct xdr_stream

This commit removes the last usage of the original decode_sattr3(),
so it is removed as a clean-up.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-10-20 17:04:03 -04:00
commit f8a38e2d6c