userns: Replace user_ns_map_uid and user_ns_map_gid with from_kuid and from_kgid

These function are no longer needed replace them with their more useful equivalents.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
4 files changed