ANDROID: GKI: Enable GENERIC_IRQ_CHIP

This feature is only used by arm/arm64 boards but it builds on x86 too
so enable it everywhere for build coverage.

Bug: 153699377
Bug: 154880035
Change-Id: I30c78c394c7d95a02d75d39101c414d37b824024
Signed-off-by: Alistair Delva <adelva@google.com>