LU-9679 lodlov: use OBD_ALLOC_PTR_ARRAY() and others

LU-9679 lodlov: use OBD_ALLOC_PTR_ARRAY() and others

Use:
  OBD_ALLOC_PTR_ARRAY
  OBD_FREE_PTR_ARRAY
  OBD_ALLOC_PTR_ARRAY_LARGE
  OBD_FREE_PTR_ARRAY_LARGE

for allocating and freeing arrays in lod and lov.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Ia782fc903761e21be982e4553ec40035c57f73f3
Reviewed-on: https://review.whamcloud.com/38254
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>