EX-2674 kernel: add kernel config file for RHEL 8.3 aarch64

EX-2674 kernel: add kernel config file for RHEL 8.3 aarch64

This patch adds the kernel config file to support
RHEL 8.3 aarch64 server.

Test-Parameters: trivial \
clientdistro=el8.3 serverdistro=el8.3 \
clientarch=aarch64 serverarch=aarch64 \
testlist=sanity

Change-Id: Id63b4ed0622701bb4fb4ab00e38ecb7e0c6ab7ec
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/41780
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Minh Diep <mdiep@whamcloud.com>
Tested-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>