Experimentation with Allwinner A80 on Cubieboard4.

toolchain:
  Requires arm-none-eabi- toolchain.

boot:
  Contains start code, when built, can be prefixed with boot_head using mksunxiboot tool from sunxi-tools repo and run on Cubieboard4.
  Turns on the Red LED.
    sh ./build.sh
    ../tools/bin/mksunxiboot boot.bin boot0.bin
    dd if=boot0.bin of=<sdcard> bs=1k seek=8