trats: usb: Add usb_cable_connected() function

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/trats.h b/include/configs/trats.h
index 3d080c4..8ff9800 100644
--- a/include/configs/trats.h
+++ b/include/configs/trats.h
@@ -308,6 +308,7 @@
 #define CONFIG_USB_GADGET_S3C_UDC_OTG
 #define CONFIG_USB_GADGET_DUALSPEED
 #define CONFIG_USB_GADGET_VBUS_DRAW	2
+#define CONFIG_USB_CABLE_CHECK
 
 /* LCD */
 #define CONFIG_EXYNOS_FB