ARMV7: OMAP4: twl6030 add battery charging support

Add battery charging support twl6030 driver.
Add support for battery voltage and current measurements.
Add command to get battery status and start/stop battery charging from USB.

Signed-off-by: Balaji T K <balajitk@ti.com>
Tested-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h
index ed0bd41..bdd330a 100644
--- a/include/configs/omap4_sdp4430.h
+++ b/include/configs/omap4_sdp4430.h
@@ -102,6 +102,7 @@
 
 /* TWL6030 */
 #define CONFIG_TWL6030_POWER		1
+#define CONFIG_CMD_BAT			1
 
 /* MMC */
 #define CONFIG_GENERIC_MMC		1