ARM: tegra: colibri: Add touch pen interrupt pin muxing

Add TOUCH_PEN_INT# pin muxing required for proper STMPE811 touch screen
controller operation.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra30-colibri.dtsi

@@ -183,6 +183,15 @@ lcd_dc1_pd2 {
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
 			};
+
+			/* TOUCH_PEN_INT# */
+			pv0 {
+				nvidia,pins = "pv0";
+				nvidia,function = "rsvd1";
+				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
+			};
 		};
 	};