LU-6142 mdt: Fix style issues for mdt_recovery.c

LU-6142 mdt: Fix style issues for mdt_recovery.c

This patch fixes issues reported by checkpatch
for file lustre/mdt/mdt_recovery.c

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: Ib7a0795cf2d48c078c140aef8501a167fb24d74c
Reviewed-on: https://review.whamcloud.com/38932
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>