LU-6142 ofd: SPDX for OBD Filter Device

LU-6142 ofd: SPDX for OBD Filter Device

Convert from verbose license text to SPDX.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Id084f69b2623c09150403105af2484e23f583c25
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57794
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>