Create excelsior-bootloader package

- Takes u-boot, ATF, and optee and generates fip image
- Includes signed bl2.img
- Service to keep fip.bin, bl2.img, and u-boot-env.bin up to date
- Generate u-boot-env.bin

Change-Id: I1cc87e3e2c2c4140b8fe4dca79ec068cae232bc7
12 files changed
tree: 0bfc4cea06d4d6c7feb4804d5bb677dcb4a9d38a
  1. debian/
  2. mt8167-coral/
  3. usr/
  4. boot.txt
  5. ubootenv.py