hikey-kernel: Reorganize prebuilt kernel directory

Switch to using <board>/<kernel ver>/<file> rather then
<file>-<board>-<kernel ver>

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: Idc9d42578c77142b4b23616bde058d6781bbaaea
9 files changed
tree: 0c9a7fc06c6b4aac370ae987848b9342d8d17e7e
  1. hikey/
  2. hikey960/
  3. update-prebuilts.sh