MFC of head thunderbolt support for mfi(4)

MFC of head thunderbolt support for mfi(4)

r233711 -- IFV head_mfi into head for initial thunderbolt support
r233768 -- atomic_t --> mfi_atomic
r233805 -- fix tinderbuild, move megasas_sge to mfivar.h
r233877 -- remove atomic.h from includes
r235014 -- fix reading of sector >= 2^32 or 2^21, repair RAID handling
r235016 -- style(9)
r235040 -- fix returns from mfi_tbolt_sync_map_info()
r235318 -- repair panic on PAE i386
r235321 -- repair the repair of panics on PAE i386

git-svn-id: svn://svn.freebsd.org/base/stable/8@235625 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f