hammerhead: update prebuilt kernel am: fd228dae87
am: 24bbf1f5f8

* commit '24bbf1f5f8e266d8a0ea4a5739a99cbe98131d9f':
  hammerhead: update prebuilt kernel
tree: 351dc618c58e2106481f7164d4c18098d3e7c6c4
  1. zImage-dtb