LU-6142 obd: fix white space, header

LU-6142 obd: fix white space, header

Convert all of the remaining spaces to tabs. Also,
add SPDX text to file.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I2d4e71646f7aaa286f7500564c817c76a4b716ed
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51738
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>