hammerhead: Fix invalid input_boost value

Change-Id: Id42606c85682a88ed64c8033b2db1724c9015117
Add Bootloader Assert

Per cyanogen, users on older bootloader/basebands are prone to
adverse behavior in respect to recent commits for the device.

Add assert to alert user to begin firmware update process manually.

Change-Id: I332a5cd81a8ecf4a28fd278d448bb1a9a6c44158
Revert "Revert "Disable separated DTB build and remove dtbtool""

This reverts commit a9711a8e71ac455a134bc5e3c1334295122cf785.
hammerhead: Remove deprecated flag

Change-Id: Id52576dd2262eca00292a90511245445dab2ae08
Merge branch 'kitkat' of github.com:AOKP/device_lge_hammerhead into HEAD