OMAP3: Add SPL_BOARD_INIT hook

Add an SPL_BOARD_INIT hook and for OMAP3 have it turn on i2c.  OMAP4
doesn't need i2c enabled in SPL.  Enable SPL_BOARD_INIT on devkit8000.

Cc: Frederik Kriewitz <frederik@kriewitz.eu>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index cdf452d..1f33c63 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -40,6 +40,7 @@
 #include <asm/armv7.h>
 #include <asm/arch/gpio.h>
 #include <asm/omap_common.h>
+#include <i2c.h>
 
 /* Declarations */
 extern omap3_sysinfo sysinfo;
@@ -89,6 +90,10 @@
 	return omap3_boot_device;
 }
 
+void spl_board_init(void)
+{
+	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+}
 #endif /* CONFIG_SPL_BUILD */