ghost: Clean up init

* Consolidate init scripts
* Remove unused init items
* Create firmware symlinks at compile time
* Reorganize services, property triggers
* Mount filesystems from fstab
* Remove FM radio script, Moto X lacks antenna

Change-Id: I1dd46817201901ce709c9b88d93c817259783b5f
ghost: Use wcnss_service to initialize wifi

Change-Id: I47a250a6ee6beb25d91b8904d42ea84b8ce60864