Revert "Revert "hammerhead: update prebuilt kernel""

This reverts commit 631bd8556a654e25e4e4787a18aa3d9201f0fbe4.
diff --git a/zImage-dtb b/zImage-dtb
index 078fe8e..804fb1b 100644
--- a/zImage-dtb
+++ b/zImage-dtb
Binary files differ