Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

5416 and later parts mux the gpio outputs; extend the api to include
a signal type that's used to select the appropriate mux

add FreeBSD property

import ath hal

virgin import of ath hal