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_beagle.h b/include/configs/omap3_beagle.h
index 804e307..dbe3e9b 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -59,9 +59,9 @@
 #define CONFIG_SYS_I2C_NOPROBES		{{0x0, 0x0}}
 
 /* USB */
-#define CONFIG_MUSB_GADGET
+#define CONFIG_USB_MUSB_GADGET
 #define CONFIG_USB_MUSB_OMAP2PLUS
-#define CONFIG_MUSB_PIO_ONLY
+#define CONFIG_USB_MUSB_PIO_ONLY
 #define CONFIG_USB_GADGET_DUALSPEED
 #define CONFIG_TWL4030_USB		1
 #define CONFIG_USB_ETHER