xfs_quota: un-flag non-foreign-capable commands

xfs_quota: un-flag non-foreign-capable commands

The off command calls XFS_QUOTAOFF / Q_XQUOTAOFF, which calls
quota_disable in the kernel, which returns ENOSYS if the
->quota_enable quota op doesn't exist - and it does not exist
on any non-xfs filesystems.

We could get clever if we wanted it, and send Q_QUOTAOFF
instead for foreign filesystems, but for now it's broken
so just remove the flag.

The free command relies on XFS_IOC_FSGEOMETRY_V1, so unflag it
as well.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com
Signed-off-by: Dave Chinner <david@fromorbit.com>