Revert "nfscommon: Return NFSERR_ATTRNOTSUPP for AUDIT/ALARM ACEs"

This reverts commit f10dc28ec21db60cf1faa3c4b445c4065e760dba.

The client should still be able to getfacl
audit and alarm ACEs, for non-FreeBSD NFSv4 servers.

A patch that only disables audit/alarm for the server
side will be committed to replace this patch.