defconfig: msm: Enable GICv3 access control

ITS register space of GICv3 is configured by higher
excpetion level. Prevent Kernel from accessing
this register space.

Change-Id: I5b45b7bca8e60e6d799e50612406d88b33b98f7a
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>
Signed-off-by: Puja Gupta <pujag@codeaurora.org>