ARM: tegra: colibri: Add pin muxing for on-module power I2C

Add pin muxing for the on-module power I2C bus which connects to the
PMICs, temperature sensor and touch screen controller.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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

@@ -159,6 +159,18 @@ sdmmc4_dat0_paa0 {
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 			};
 
+			/* Power I2C (On-module) */
+			pwr_i2c_scl_pz6 {
+				nvidia,pins = "pwr_i2c_scl_pz6",
+					      "pwr_i2c_sda_pz7";
+				nvidia,function = "i2cpwr";
+				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
+				nvidia,lock = <TEGRA_PIN_DISABLE>;
+				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
+			};
+
 			/*
 			 * THERMD_ALERT#, unlatched I2C address pin of LM95245
 			 * temperature sensor therefore requires disabling for