Update overlays - remove camera and fix SD card mount

Change-Id: I66d11c04c89c6705353ef847849ec5458a7e4f17
Update ramdisk and init

Most changes pulled from evervolv. SD card mounting is fixed for USB, but I'm
not sure if it was fixed due to overlay changes or this ramdisk. Radio still
not working properly with this configuration and blobs in vendor.

Change-Id: I82c563b18bac9e4cb13f34b0f4c3ef350d7d4346