ARM: tegra: enable I2C buses for P2771-0000

Enable I2C devices in DT and enable building tegra_i2c.c driver.

Signed-off-by: Bryan Wu <pengw@nvidia.com>
(swarren, commit msg rework, fixed DT node sort order)
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/dts/tegra186-p2771-0000.dtsi

@@ -10,14 +10,49 @@
 
 	aliases {
 		sdhci0 = "/sdhci@3460000";
+		i2c1 = "/i2c@3160000";
+		i2c2 = "/i2c@c240000";
+		i2c3 = "/i2c@3180000";
+		i2c4 = "/i2c@3190000";
+		i2c5 = "/i2c@31c0000";
+		i2c6 = "/i2c@c250000";
+		i2c7 = "/i2c@31e0000";
 	};
 
 	memory {
 		reg = <0x0 0x80000000 0x0 0x60000000>;
 	};
 
+	i2c@3160000 {
+		status = "okay";
+	};
+
+	i2c@3180000 {
+		status = "okay";
+	};
+
+	i2c@3190000 {
+		status = "okay";
+	};
+
+	i2c@31c0000 {
+		status = "okay";
+	};
+
 	sdhci@3460000 {
 		status = "okay";
 		bus-width = <8>;
 	};
+
+	i2c@c240000 {
+		status = "okay";
+	};
+
+	i2c@c250000 {
+		status = "okay";
+	};
+
+	i2c@31e0000 {
+		status = "okay";
+	};
 };

include/configs/p2771-0000.h

@@ -14,6 +14,9 @@
 /* High-level configuration options */
 #define CONFIG_TEGRA_BOARD_STRING	"NVIDIA P2771-0000"
 
+/* I2C */
+#define CONFIG_SYS_I2C_TEGRA
+
 /* SD/MMC */
 #define CONFIG_MMC
 #define CONFIG_GENERIC_MMC