[Linaro-uefi] [PATCH 0/2] ArmPkg/ArmGicArchLib: use common source file

The Arm and Aarch64 source files for ArmGicArchLib are copy/paste of each other with one minor difference to how they check for if the platform has GICv3.

I made the change in two patches so that the diff could be identified separately from the move commit.

The first patch makes both the Arm and Aarch64 versions identical and uses conditional compilation to handle Arm vs Aarch64.

[PATCH 1/2] ArmPkg/ArmGicLibArchLib: common check for GICv3

The second patch then removes the duplication in favour of a single source file.

[PATCH 2/2] ArmPkg/ArmGicArchLib: use common source file