LU-16796 libcfs: Remove reference to LASSERT_ATOMIC_POS

LU-16796 libcfs: Remove reference to LASSERT_ATOMIC_POS

This patch removes all reference to LASSERT_ATOMIC_POS macro.
Once all the access is removed it would be easier to just
toggle atomic_* API calls with recount_* counts.

Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I2051de3707106532259e51ec3e4c890c65836b1a
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50881
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Neil Brown <neilb@suse.de>