msm8226-common: Clean up init

* Consolidate init scripts
* Remove unused init items
* Create firmware symlinks at compile time
* Reorganize services, property triggers

Change-Id: If6417a7607afe2fac69d5287bdf682f6df9dd106
msm8226-common: Mount firmware partitions from fstab

Change-Id: I1f58651a2aa11331733079bb64a2cb8e8683dc65