Add missing buffersize for wifi

Change-Id: I194496592ff3bd969186677b854f72423724f34c
serrano: Make rtc0 device group read/writable

Change-Id: I7fd48a89aed39e87e5371257b56dfaa6c760b2e1
Change tether regexs

Change-Id: I6edca85cab6e12b2e4c6ffbf82006d6d54494866