Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Extract vendor specific Book-E pieces into separate files and have a commonskeleton (maybe we should kobj-tize this one day).Note the PPC4xx bit is not connected to the build yet.Obtained from: AppliedMicro, Semihalf.