ARM: tegra: colibri_t20: iris: add uart-c

Add UART-C.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20-colibri-iris.dts

@@ -103,6 +103,11 @@ serial@70006000 {
 		status = "okay";
 	};
 
+	/* Colibri UART-C */
+	serial@70006040 {
+		status = "okay";
+	};
+
 	/* Colibri UART-B */
 	serial@70006300 {
 		status = "okay";