(split) Extract the location of the remapping hardware units from the ACPI DMAR table.

Submitted by:	Gopakumar T (gopakumar_thekkedath@yahoo.co.in)
(split) Add in some backwards compatability hacks to make -HEAD net80211 compile
on -9.
(split) Migrate the ff_encap1() routine out into the normal output code.

This will eventually be used by the A-MSDU encapsulation code that
I'm writing - the sub-frame encapsulation requirement is the same.
(split) Merge branch '9cfbf273'