dev, arm: accept and ignore writes to GIC APRn registers

Otherwise the Linux kernel v4.17 boot fails with error:

Tried to write Gic cpu at offset 0xd0

Change-Id: Ie8063212c9e2b29e2e4766801b4b9538e9eccbf8
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/11590
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2 files changed