hammerhead: Enable ZSL mode for camera

 * With recent kernel changes, we no longer crash when letting the
   preview run during continuous shots. Enjoy rapid-fire shooting.

Change-Id: Ib57869f185166539d761fd5a2766c586501023da
hammerhead: Add offload properties

 * Set fragment size (same as default)
 * Enable gapless playback with offloaded streams
 * Enable offloading for AV (but not streaming AV!)

Change-Id: I1b0f8115bc880bd89f5a0c8ed13e4b54d38e0867
hh: Enable qrngd

 * Improves boot time

Change-Id: I524d4fb248b0103543703eae923267b0c410b3ef

Conflicts:
	init.hammerhead.rc
hh: Disable gapless by default

 * Audio driver will enable as necessary. Leaving it on always
   causes issues in some apps like Pandora.

Change-Id: I59a732577c3a4a61c8949498101b4b5bae0998ce
hammerhead: recovery: Hide most partitions for format/mount'ing

Change-Id: If822566c5b7064155ddd385081a027c88fdaefaa
Disable separated DTB build and remove dtbtool

* hammerhead uses DTB appended to zImage (zImage-dtb)

Change-Id: I938c0531130bc76a04494b13411cd95a6d960984
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>
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