LU-13590 kernel: new kernel [RHEL 7.9 3.10.0-1160.2.1.el7]

LU-13590 kernel: new kernel [RHEL 7.9 3.10.0-1160.2.1.el7]

This patch makes changes to support new RHEL 7.9 release
for Lustre client.

Test-Parameters: trivial clientdistro=el7.9

Change-Id: I7a2846de48a6710d6d720d6ccc3176dba4afc6bb
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/40142
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>