defconfig: arm64: msm: Enable Access control for Gic

Add config option to enable access control to GIC ITS registers
which are controlled in EL2 by hypervisor.

Change-Id: I27de0c530091aefaebb20706417bfe99da595c08
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>