dm: tegra: pci: Move CONFIG_PCI_TEGRA to Kconfig

Move this option to Kconfig and fix up all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 167d405..c219c19 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -19,4 +19,14 @@
 	  the device tree but the normal PCI scan technique is used to find
 	  then.
 
+config PCI_TEGRA
+	bool "Tegra PCI support"
+	depends on TEGRA
+	help
+	  Enable support for the PCIe controller found on some generations of
+	  Tegra. Tegra20 has 2 root ports with a total of 4 lanes, Tegra30 has
+	  3 root ports with a total of 6 lanes and Tegra124 has 2 root ports
+	  with a total of 5 lanes. Some boards require this for Ethernet
+	  support to work (e.g. beaver, jetson-tk1).
+
 endmenu