PCI: tegra194: Cleanup unused code

Remove unused code from function tegra_pcie_config_ep.

Link: https://lore.kernel.org/r/20210623100525.19944-6-omp@nvidia.com


Signed-off-by: Om Prakash Singh <omp@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Vidya Sagar <vidyas@nvidia.com>