Fix Ubuntu Touch cmdline (set console=tty0)

* Fixes 30s freeze during boot, something tries to write into
  serial console and it takes a while until it timeouts
Set CPU scaling governor to ondemand or interactive in trampoline

* The default governor on hammerhead is performance -> loads of
  useless heat
Merge branch 'android-4.4-mrom' of github.com:Tasssadar/android_device_lge_hammerhead into android-4.4-mrom