hikey: Remove FAT bootimg support

The FAT bootimg support has been technically broken for
a few weeks as it doesn't support Image.gz formatted
kernels.

Thus, lets make it official and remove the support.

Change-Id: Ie9da2ab653df0b176ed5a9da148e459a767d1ca7
Signed-off-by: John Stultz <john.stultz@linaro.org>
5 files changed