fixup! irqchip: Define additional MMIO offsets

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
fixup! KVM: arm-vgic: Add vgic reg access from dev attr

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
KVM: arm-gic: Support user-space CPU int. register access

Implement support for the CPU interface register access from user space
to support save/restore of VGIC state.

This commit supports the same logic as the current VGIC support.  For
example, the active priority registers are handled as RAZ/WI.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>