PCI: tegra194: Rename tegra_pcie_dw to tegra194_pcie

Rename tegra_pcie_dw to tegra194_pcie to match the convention of
<driver>_pcie. No functional change intended.

[bhelgaas: rename functions similarly]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Fan Fei <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Jonathan Hunter <[email protected]>

Author: firebolt007