add some hellfire stuff

Change-Id: I0599724c22890496e6edb25b688bc67a83831ce9
BoardConfig: increase ramdisk_offset

* lz4 is huge (that's what she said) so we need to increase the
  ramdisk offset to make room for the larger zImage

Change-Id: I34e9cdc6b52050249dda1e92aff11b4385a36fd0