allow TWRP to format partitions

Change-Id: Iedf3ab2ed4a1dcaf15ded6dfd2693d9d1b556ea4
twrp: fstab cleanup

Change-Id: I6d4959c5572192d0fce183ec3991671e038c2ca4
sdcard / wifi changes for 4.4

Change-Id: I5ed96082d59c7c12749562118bf0bcf135a883c8