Silicon/Phytium: Added Acpi support to FT2000/4

Added Acpi driver and table to FT2000/4,
the ACPI Tables providing library AcpiTables.inf uses
a lot of information that is available in the form of PCDs
for differnt platforms.

Signed-off-by: Ling Jia <jialing@phytium.com.cn>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>