Bring in 1.343 from FreeBSD. FreeBSD commit message:
commit562e26481ec649eacbb8b8ac3fade8530ba6e974
authorMatthew Dillon <dillon@dragonflybsd.org>
Sat, 2 Jun 2007 18:48:40 +0000 (2 18:48 +0000)
committerMatthew Dillon <dillon@dragonflybsd.org>
Sat, 2 Jun 2007 18:48:40 +0000 (2 18:48 +0000)
treee8ea0aaa9ddffa4b44390ebef93d02d34e9c9035
parent0c7501cd36fecf53ec58f89179be3864864d0040
Bring in 1.343 from FreeBSD.  FreeBSD commit message:
"Add support for chipsets that has NULL'd BAR's for legacy ports.
This allows DMA to be used on a fine little geode system I got here and
most like on lots of older systems like that."

Obtained-from: FreeBSD / sos
sys/bus/pci/pci.c