PCI: tegra194: Add Tegra234 PCIe support

Add support for Synopsys DesignWare core IP based PCIe host controllers
present in the Tegra234 SoC.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vidya Sagar <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>

Author: Vidya Sagar