LU-6142 utils: Fix style issues for mount_utils.c

LU-6142 utils: Fix style issues for mount_utils.c

This patch fixes issues reported by checkpatch
for file lustre/utils/mount_utils.c

Change-Id: Ic60df860a15d8b66ec37c979eec66b2bc0c52dea
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-on: https://review.whamcloud.com/34439
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>