Tegra20 and Tegra30 do not support gen2 PCIe, so correct the
register setting to disable it.
Signed-off-by: NEric Brower <ebrower@nvidia.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NThierry Reding <treding@nvidia.com>