r4646 enabled early usage of pci_{read,write}_config{8,16,32}

r4646 enabled early usage of pci_{read,write}_config{8,16,32}

This allows us to change
dword = pci_cf8_conf1.read32(&pbus, sm_dev->bus->secondary,
        sm_dev->path.pci.devfn, 0x64);

to the much more readable
dword = pci_read_config32(sm_dev, 0x64);

Clean up all PCI operations in mainboards based on AMD 690:
amd/pistachio
amd/dbm690t
technexion/tim8690

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4647 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1