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/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index c859df2..e9811c3 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -125,7 +125,7 @@
 #endif
 
 /* Mentor high speed "dual role" controller, in peripheral role */
-#ifdef CONFIG_MUSB_GADGET
+#ifdef CONFIG_USB_MUSB_GADGET
 #define gadget_is_musbhdrc(g)	(!strcmp("musb-hdrc", (g)->name))
 #else
 #define gadget_is_musbhdrc(g)	0