LU-8191 lustre: convert osp,osd,osc,ofd functions to static

LU-8191 lustre: convert osp,osd,osc,ofd functions to static

Static analysis shows that a number of functions
could be made static. This patch declares several
functions in osp, osd, osc, and ofd static.

Also, fix a few minor style issues.

Lustre-change: https://review.whamcloud.com/51477
Lustre-commit: 2fa075d10f72f1400e4da9bdcaec905858b0a264

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I3d7af7ec0fa2978bfdd0cb490f18f485a78f81f6
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/54616
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>