staging: clean up checkpatch warnings in lustre

Silence checkpatch warning:

WARNING: type 'long long unsigned' should be specified in
[[un]signed] [short|int|long|long long] order

Signed-off-by: Eddie Kovsky <ewk@edkovsky.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>