Chipset check is wrong with some pci cards

[Marcin Juszkiewicz]

hrw@krzys:~$ lspci|grep "PCI bridge"
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01)
00:1c.2 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 3 (rev 01)
00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
05:00.0 PCI bridge: Intel Corporation 21152 PCI-to-PCI Bridge

And now imagine that 21152 card will be present on ATI/AMD/SIS powered mainboard. Your code will tell that Intel chipset is present on mainboard.

05:00:0 card is PCI->miniPCI adapter.