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/omap3_igep00x0.h b/include/configs/omap3_igep00x0.h
index 89ec73c..8785d8f 100644
--- a/include/configs/omap3_igep00x0.h
+++ b/include/configs/omap3_igep00x0.h
@@ -54,7 +54,7 @@
 #define CONFIG_OMAP3_GPIO_6		/* GPIO160..191 is in GPIO bank 6 */
 
 /* USB */
-#define CONFIG_MUSB_UDC			1
+#define CONFIG_USB_MUSB_UDC			1
 #define CONFIG_USB_OMAP3		1
 #define CONFIG_TWL4030_USB		1