LU-15502 mdt: cleanup whitespace in mdt_open.c

LU-15502 mdt: cleanup whitespace in mdt_open.c

Change spaces to tabs for indent and do not align local variables.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I1b89ffd54d41ce42738b061738f990d0326bf9af
Reviewed-on: https://review.whamcloud.com/46385
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>