arm-bsp: Build UEFI EDK2 firmware for N1SDP

- Add bbappend recipe to configure N1SDP specifics
- Enable UEFI EDK2 firmware build for N1SDP.
- Update machine conf to add dependency
  for EDK2 firmware components

Change-Id: I89d41c176f31bce6f1df7f3b3a7cd624b46c05e1
Issue-Id: PLATFORMS-3134
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>