ArmVirtualizationPkg/PciHostBridgeDxe: translate addresses for IO

ArmVirtualizationPkg/PciHostBridgeDxe: translate addresses for IO

Unlike the one in PcAtChipsetPkg, our PciHostBridgeDxe module must handle
address space translation. IO addresses expressed in the respective
aperture are mapped to a different base in CPU address space.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16899 6f19259b-4bc3-4df7-8a09-765794883524