LU-6142 osd-ldiskfs: Fix style issues for osd_iam_lvar.c

LU-6142 osd-ldiskfs: Fix style issues for osd_iam_lvar.c

This patch fixes issues reported by checkpatch
for file lustre/osd-ldiskfs/osd_iam_lvar.c

Change-Id: I11d4836e869314accc1123f2167db556f82e823f
Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-on: https://review.whamcloud.com/32850
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>