LU-6142 lov: chnage lsm_op_find() to a non-inline function.

LU-6142 lov: chnage lsm_op_find() to a non-inline function.

Making lsm_op_find() non-inline improves encapsulation and means that
various _ops structures can now be static.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Ifee2ab4f023e56bfa1e663a0106590cf7858856b
Reviewed-on: https://review.whamcloud.com/39377
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>