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
Enable smart cover option through overlay

Change-Id: Icdcf083b19b2b320ef93b0b3aac4c514c5d1dbdc