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/musb-new/musb_dma.h b/drivers/usb/musb-new/musb_dma.h
index 3a97c4e..17fe89f 100644
--- a/drivers/usb/musb-new/musb_dma.h
+++ b/drivers/usb/musb-new/musb_dma.h
@@ -62,7 +62,7 @@
 
 #define	DMA_ADDR_INVALID	(~(dma_addr_t)0)
 
-#ifndef CONFIG_MUSB_PIO_ONLY
+#ifndef CONFIG_USB_MUSB_PIO_ONLY
 #define	is_dma_capable()	(1)
 #else
 #define	is_dma_capable()	(0)