Platform/Sgi: Add MPAM ACPI macros in common header

Define a helper macro which deals with MPAM ACPI table population. The
ACPI table population macro internally calls into the MPAM MSC node
population macro, MSC resource population macro, CPU cache locator
macro and interrupt flag population macro. Add all the above said
macros to the common header file for Neoverse reference design
platforms to use.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I578ead06538aeb2c90a99077651fd49efebf3b19