bullhead: update kernel prebuilt [ DO NOT MERGE ANYWHERE ] am: 808ad0b2f1  -s ours
am: b7f0375a62  -s ours

Change-Id: I13ce6a9d2c26827df8b5ebb7ae5cbac8c7d5658b
tree: cdb7506d3e17c3e9fa851f75ae846285fab14749
  1. Image.gz-dtb