Revert "Update Wifi Config"

This reverts commit ff3771f26ba6f86c4442649c8090d36db5d1eaf6.
Fiy overlay

Change-Id: Ic73ca8cad5eb06189bebcc4c01c257724e6cb2c6
Fix external sdcard as specified in config-example

Change-Id: I69d984254b1d5258943b8a0c8214e264cac1b3eb