LU-6142 obdclass: SPDX for OBD Class

LU-6142 obdclass: SPDX for OBD Class

Convert from verbose license text to SPDX.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ieaa62c9f4177abdeae18e55e5c8ce6dc638a8918
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57351
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>