DynamicTablesPkg: Remove GIC Distributor Id field

DynamicTablesPkg: Remove GIC Distributor Id field

According to ACPI 6.2 Specification - Errata A, 'One,
and only one, GIC distributor structure must be present
in the MADT for an ARM based system'. Therefore,
the GIC Distributor ID field in the ACPI MADT GICD
substructure can be set to zero and there is no need
for the Configuration Manager to provide this information.

Update the CM_ARM_GICD_INFO structure to remove the GicId
field. Similarly update the MADT Generator to set the GicId
field in the GICD substructure to zero.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Alexei Fedorov <alexei.fedorov@arm.com>