arm64: defconfig: Add Tegra194 PCIe driver

Add PCIe host controller driver for DesignWare core based PCIe
controller IP present in Tegra194.
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/configs/defconfig

@@ -191,6 +191,7 @@ CONFIG_PCIE_QCOM=y
 CONFIG_PCIE_ARMADA_8K=y
 CONFIG_PCIE_KIRIN=y
 CONFIG_PCIE_HISI_STB=y
+CONFIG_PCIE_TEGRA194=m
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y