tegra: i2c: Initialise I2C on Nvidia boards

This enables I2C on all Nvidia boards including Seaboard and
Harmony.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

board/nvidia/common/board.c

@@ -34,6 +34,7 @@
 #include <asm/arch/uart.h>
 #include <spi.h>
 #include <asm/arch/usb.h>
+#include <i2c.h>
 #include "board.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -75,6 +76,12 @@ int board_init(void)
 #endif
 	/* boot param addr */
 	gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
+#ifdef CONFIG_TEGRA_I2C
+#ifndef CONFIG_SYS_I2C_INIT_BOARD
+#error "You must define CONFIG_SYS_I2C_INIT_BOARD to use i2c on Nvidia boards"
+#endif
+	i2c_init_board();
+#endif
 
 #ifdef CONFIG_USB_EHCI_TEGRA
 	pin_mux_usb();