Base: Fix tethering (softap) startup.

The interface must be started after firmware reload. If it's not
started, the driver is unable to configure it.

Thanks to Emerson Pinter <dev@pinter.com.br> for the jb version of this.

Change-Id: I7a6698a6d7e776f5f3c61f6ee83d284a81a8eec8