usb: musb-new: CONFIG_MUSB prefix replacement with CONFIG_USB_MUSB

USB-related options are usually prefixed with CONFIG_USB and platform-specific
adaptation for the MUSB controller already have a CONFIG_USB_MUSB prefix, so
this switches all MUSB-related options to a CONFIG_USB_MUSB prefix, for
consistency.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/include/configs/nokia_rx51.h b/include/configs/nokia_rx51.h
index 6e3ce4d..7ec9965 100644
--- a/include/configs/nokia_rx51.h
+++ b/include/configs/nokia_rx51.h
@@ -108,8 +108,8 @@
 #define CONFIG_DOS_PARTITION
 
 /* USB */
-#define CONFIG_MUSB_UDC
-#define CONFIG_MUSB_HCD
+#define CONFIG_USB_MUSB_UDC
+#define CONFIG_USB_MUSB_HCD
 #define CONFIG_USB_OMAP3
 #define CONFIG_TWL4030_USB