msm8960: move fstab to device trees

* remove manual mounts in init, we should be mounting
  everything via fstab now

Change-Id: Ic08aeebb1bd69dc751c7187c6351ad4b31ecd621
sepolicy: remove vfat access for ueventd

* we'll give the partition a context when we mount rather
  than giving ueventd full reigns on the vfat context

Change-Id: I7b59ec2af9af0855bdf4c7118e820f035d825579