Revert "m7: Update usbdisk secondary storage mounts"

This reverts commit 7ba1a12976a625e5eea775889ffbb543e65e3a00.
m7-common: Update storage configuration for usbdisk

Fixes mounting of storage connected via USB-OTG

Change-Id: Ibda5415db07a9dd28f9f430561800cd9de4ba9ca
m7-common: update wifi config

* Update from hammerhead

Change-Id: I1095f6c4b38db887f095a4321c93cb464222b674
m7-common: clean up init script

Change-Id: Ia622eb4a9867bf67c96b4cef1468d058562aeeba
m7-common: Fix remote submix

* Declare remote submix as a valid input

Change-Id: Ifb55029fd37eaf8b9e92ae5fb07320d462008f2f