hammerhead: update prebuilt kernel am: 984be8d24b am: d2f80b57ce
am: a799c5e3d6

* commit 'a799c5e3d6f764d22b650eab5d3ad987769a96ae':
  hammerhead: update prebuilt kernel
tree: f0cd38b301d484d703b61094540fb09640bc2c43
  1. zImage-dtb