hammerhead: update prebuilt kernel [DO NOT MERGE] am: 79297c72b9  -s ours
am: 20b259cbbf

* commit '20b259cbbf4b5a35e114037eec9791ee41e79ce8':
  hammerhead: update prebuilt kernel [DO NOT MERGE]
tree: f0cd38b301d484d703b61094540fb09640bc2c43
  1. zImage-dtb