Platform/ARM/Sgi: Pick ACPI tables to install based on platform ID

Use the platform ID and config ID values from the platform ID
HOB to choose the right set of ACPI tables to be installed.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>