UEFI Shell 22H1

* From edk2-stable202205
* Note: EDK2 now requires nasm 2.15.05 or later to compile
  which the GitHub Actions Ubuntu image does not have...

UEFI Shell 21H2

* From edk2-stable202108
* Enable RISC-V 64-bit support

UEFI Shell 21H1

* From edk2-stable202105

UEFI Shell 20H2

* From edk2-stable202011

Initial commit