drivers: pinctrl: create Tegra DM pinctrl driver

The existing pinctrl driver available for Tegra SOC is well
designed, but it lacks DM support. Let's add a DM compatible
overlay, which allows use of the device tree, along with preserving
backward compatibility with all existing setups and the ability
to use it in SPL board configuration stage.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index fc1f01a..96a0516 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -17,6 +17,7 @@
 obj-$(CONFIG_ARCH_RZN1) += renesas/
 obj-$(CONFIG_PINCTRL_SANDBOX)	+= pinctrl-sandbox.o
 obj-$(CONFIG_PINCTRL_SUNXI)	+= sunxi/
+obj-$(CONFIG_$(SPL_)PINCTRL_TEGRA)	+= tegra/
 obj-$(CONFIG_PINCTRL_UNIPHIER)	+= uniphier/
 obj-$(CONFIG_PINCTRL_PIC32)	+= pinctrl_pic32.o
 obj-$(CONFIG_PINCTRL_EXYNOS)	+= exynos/