Revert "softap: only keep the stop interface fix"

This reverts commit 21ba2c3646dcdafa1ad3eb2431306091b5702110.
Return to cm9 softap config, it's easier to fix in netd

Change-Id: Ida72caf0a6361ef0639dbd695df7fc394d71c75a
softap: only keep the stop interface fix