shamu: update prebuilt kernel [ DO NOT MERGE ] am: 6ac753ff33 am: 75aded6edf am: f9b0238ba2  -s ours
am: 81872c282b

Change-Id: I9172bb04a33b4507af6148945b4cade255b43a6e
tree: 8bdbd3d26601b16fc26bef3f5a1b93040b3bce74
  1. zImage-dtb