staging: lustre: cleanup le32 assignment to ldp_flags

Introduces a local var to collect flags and convert
them to le32.

Fixes the following sparse warnings:

drivers/staging/lustre/lustre/lmv/lmv_obd.c:2305:23: warning: invalid assignment: |=
drivers/staging/lustre/lustre/lmv/lmv_obd.c:2305:23:    left side has type restricted __le32
drivers/staging/lustre/lustre/lmv/lmv_obd.c:2305:23:    right side has type int
drivers/staging/lustre/lustre/lmv/lmv_obd.c:2383:39: warning: invalid assignment: |=
drivers/staging/lustre/lustre/lmv/lmv_obd.c:2383:39:    left side has type restricted __le32
drivers/staging/lustre/lustre/lmv/lmv_obd.c:2383:39:    right side has type int

Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>