staging/lustre/ldlm: move procfs ldlm pool stats to sysfs

Suitable contents of /proc/fs/lustre/ldlm/namespaces/.../pools/
is moved to /sys/fs/lustre/ldlm/namespaces/.../pools/:
cancel_rate grant_plan grant_speed lock_volume_factor
server_lock_volume granted grant_rate limit recalc_period

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>