LU-6142 obdclass: Fix style issues for obdo.c

LU-6142 obdclass: Fix style issues for obdo.c

This patch fixes issues reported by checkpatch
for file lustre/obdclass/obdo.c

Change-Id: Ie658d5428407f69f7654c5450464589d7ddb2282
Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-on: https://review.whamcloud.com/32982
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Ben Evans <bevans@cray.com>