p880: squashed commit of three different changes

- Add recovery-keys.c to define proper keylayout for the device
  (Now using the capacitive home button for select, this could be changed.)
- Remove unused Wi-Fi firmware from propritary files list
  (pull request in vendor repo: https://github.com/TheMuppets/proprietary_vendor_lge/pull/16)
- Remove extra compass permission (already defined in handheld_core_hardware.xml)

Change-Id: I4e354aa853efbc45c875719b919a0c9a70c03279