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

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

Add 8Gb card firmware. Update some 2Gb and 4Gb f/w sets.
Split 4Gb and 8Gb into pieces that can be either multi_id
capable or not.

Reviewed by: scottl, ken
Approved by: re