PCI: Disable Gen2 for Tegra20 and Tegra30
PCI: Disable Gen2 for Tegra20 and Tegra30

Tegra20 and Tegra30 do not support gen2 PCIe, so correct the
register setting to disable it.

Signed-off-by: Eric Brower <bdb0317701a64f20cc7a52f641d0af1fd94e71a8@nvidia.com>
Signed-off-by: Bjorn Helgaas <f10ec01be0c6b54271af5c550cd257810bdf3268@google.com>
Acked-by: Thierry Reding <3055038c414aef68bf32c33b8118623e7554e0f2@nvidia.com>
KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs