infra: update for RD-INFRA-2021.12.21 release

The RD-INFRA-2021.12.21 release includes an updated software stack for
the Neoverse RD-Edmunds platform. The updates includes software stack
rebased to the upstream components included in the software stack.

Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: I1556d0ae109af6c9f5f9d44ba33a2f6c9a7564a0