LU-6142 lmv: make various functions static.

LU-6142 lmv: make various functions static.

Multiple function in lmv_obd.c are only used in the same file, so they
can be made static.

Also make a few style cleanups and fix a spelling error.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I84bf4e8d485dc6a7f8811035b8a689e5e0d91455
Reviewed-on: https://review.whamcloud.com/39402
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>