The "ACPI for Memory System Resource Partitioning and Monitoring" spec
(Arm DEN0065, [1]) in version 2.0 described the "MMIO size" field in the
"MPAM MSC node" subtable as being always 0 if the the "PCC" interface type
is used for that MSC. Version 3.0 of the spec changes that field to convey
the enablement status of that MSC: "If set to 1, this MSC is accessible
... If set to 0, this MSC is non-functional...."
Relax the strict check for this value being 0 in the acpiview validation
checks, to also allow the new value of "1".
[1] https://developer.arm.com/documentation/den0065/3-0/
Signed-off-by: Andre Przywara <andre.przywara@arm.com>