hikey-kernel: Update kernel prebuilt to Image-dtb (6d9a0bc)
am: 518f7c5c65

* commit '518f7c5c65720790a8eca30ce5a778aaf0c969da':
  hikey-kernel: Update kernel prebuilt to Image-dtb (6d9a0bc)

Change-Id: I8ba58ba83a06145e809cf59bbdfcbb47d1376aeb