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/include/configs/devkit8000.h b/include/configs/devkit8000.h
index 4b58dc3..c090d2b 100644
--- a/include/configs/devkit8000.h
+++ b/include/configs/devkit8000.h
@@ -304,6 +304,7 @@
 
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBDISK_SUPPORT
+#define CONFIG_SPL_BOARD_INIT
 #define CONFIG_SPL_I2C_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT