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/bf527-ezkit.h b/include/configs/bf527-ezkit.h
index 28b3760..d23602b 100644
--- a/include/configs/bf527-ezkit.h
+++ b/include/configs/bf527-ezkit.h
@@ -139,10 +139,10 @@
  */
 #if !defined(__ADSPBF522__) && !defined(__ADSPBF523__)
 #define CONFIG_USB
-#define CONFIG_MUSB_HCD
+#define CONFIG_USB_MUSB_HCD
 #define CONFIG_USB_BLACKFIN
 #define CONFIG_USB_STORAGE
-#define CONFIG_MUSB_TIMEOUT 100000
+#define CONFIG_USB_MUSB_TIMEOUT 100000
 #endif
 
 /* Don't waste time transferring a logo over the UART */