LU-6142 lov: Fix style issues for lov_merge.c

LU-6142 lov: Fix style issues for lov_merge.c

This patch fixes issues reported by checkpatch
or file lustre/lov/lov_merge.c

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I6fd60dbc7c48f3dc8fc2c41e924d8d088d6912f2
Reviewed-on: https://review.whamcloud.com/38930
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Ben Evans <beevans@whamcloud.com>
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>