LU-12269 kernel: new kernel [RHEL 8.0 4.18.0-80.el8]

LU-12269 kernel: new kernel [RHEL 8.0 4.18.0-80.el8]

This patch makes changes to support new RHEL 8.0 release
for Lustre client.

Test-Parameters: trivial

This patch is back-ported from the following one:
Lustre-commit: d37b0ab99eaeeac391088848c275d2757b6ff17d
Lustre-change: https://review.whamcloud.com/34862

Change-Id: I89b4f1e59f8b25bf9d37d3564e2d05d6e87d9b38
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-on: https://review.whamcloud.com/35164
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>