Staging: lustre: lustre: ldlm: Fix do not add new typedefs

This patch fixes "do not add new typedefs" warning generated by
checkpatch.pl.
Update related files.

Signed-off-by: Haneen Mohammed <hamohammed.sa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>