ArmVirtPkg: ArmPlarformDeviceInfoLib - add GIC parser

Add functionality to parse the GIC objects from the
FDT and populate the PLATFORM_DEVICE_INFO structure.

This patch adds functionality to parse the following
GIC components and populate their base address and
range in the PLATFORM_DEVICE_INFO structure.
 - GICC
 - GICD
 - GICR

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>