arm64: KVM: Enable minimalistic support for Cortex-A53

In order to allow KVM to run on Cortex-A53 implementations, wire the
minimal support required.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: 1252b3313642c3d0dff5b951b625468bf0dcd059
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>