Revert "PCI: tegra194: Rename tegra_pcie_dw to tegra194_pcie"

Revert "PCI: tegra194: Rename tegra_pcie_dw to tegra194_pcie"

This reverts commit b572569183993b68dec0e990b33641e6f77744ba.

Revert b57256918399 ("PCI: tegra194: Rename tegra_pcie_dw to
tegra194_pcie") to keep the names of data structures generic and not
contain any one particular chip name. This is a preparatory change for the
upcoming changes that add support for Tegra234.  This has no functional
impact.

Link: https://lore.kernel.org/r/20220721142052.25971-9-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>