x86/PCI: Detect mmconfig on nVidia MCP55
x86/PCI: Detect mmconfig on nVidia MCP55

Detect and enable memory-mapped PCI configuration space on the nVidia
MCP55 southbridge.  Tested against 2.6.27.4 on an Arista Networks
development board with one MCP55, Coreboot firmware, no ACPI.

Signed-off-by: Ed Swierk <76c7423178d7c400add88920e9b3323aae9388d7@aristanetworks.com>
Signed-off-by: Yinghai Lu <0674548f4d596393408a51d6287a76ebba2f42aa@kernel.org>
Signed-off-by: Jesse Barnes <bc7add126c2dbb8382bf1c28ac262b9363a32706@virtuousgeek.org>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs