hikey: Update HiKey Debian for 2.3.0 release

- Use a newer boot image (pre-built 16.06 UEFI image)
- Remove sudo requirement when using burn-boot
- Add udev rules help, similar to the hikey.mk file
- Step up OPTEE_PKG_VERSION to 2.3-0

Known issues:
- On HiKey 4G devices it seems like the partition table is to small to
  be able fit the newer 16.06 Debian root fs. It might be that we can
  tweak the partition table a bit, but for the moment we will keep using
  the 16.03 Debian root fs.

- When running this on the device
     $ dpkg --force-all -i /tmp/linux-image-*.deb
  there will be errors like this:
     blockdev: ioctl error on BLKROSET: Operation not permitted
  According to the comments in:
     https://github.com/OP-TEE/optee_os/issues/1234


  that message only shows up on the 16.03 root fs and it seems to only
  show up when running later kernel versions. However, if you reboot the
  device, everything is working, i.e, it will boot up your new kernel
  etc. We need to investige further to find the root cause for the error
  message and to implement a proper solution without error messages.

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>