musb-new: dsps backend driver

Backend driver for MUSB OTG controllers found on TI AM33xx and
TI81xx SoCs (tested with AM33xx only).

Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
diff --git a/include/usb.h b/include/usb.h
index 4689db6..aa389e6 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -147,7 +147,8 @@
 	defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 	defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
 	defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
-	defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
+	defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
+	defined(CONFIG_USB_MUSB_DSPS)
 
 int usb_lowlevel_init(int index, void **controller);
 int usb_lowlevel_stop(int index);