boot/edk2: new package

boot/edk2: new package

EDK2 is a modern, feature-rich, cross-platform firmware development
environment for the UEFI and PI specifications.

The initial version of this bootloader package makes it possible to
build firmware for the following seven configurations:

 * QEMU x86-64 pc machine
 * QEMU aarch64 virt machine, booting directly from flash
 * QEMU aarch64 virt machine, booting via the kernel protocol
 * QEMU aarch64 sbsa-ref machine
 * ARM FVP vexpress machine
 * Socionext SynQuacer Developerbox
 * SolidRun MacchiatoBin

Support the use of EDK2 UEFI payloads as BL33 in ARM Trusted Firmware.

Signed-off-by: Dick Olsson <hi@senzilla.io>
[yann.morin.1998@free.fr:
  - duplicate defaults in Config.in
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>