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/davinci_dm355evm.h b/include/configs/davinci_dm355evm.h
index 847d788..e873fa4 100644
--- a/include/configs/davinci_dm355evm.h
+++ b/include/configs/davinci_dm355evm.h
@@ -96,11 +96,11 @@
 #endif
 
 #ifdef CONFIG_USB_DAVINCI
-#define CONFIG_MUSB_HCD
+#define CONFIG_USB_MUSB_HCD
 #define CONFIG_CMD_USB
 #define CONFIG_USB_STORAGE
 #else
-#undef CONFIG_MUSB_HCD
+#undef CONFIG_USB_MUSB_HCD
 #undef CONFIG_CMD_USB
 #undef CONFIG_USB_STORAGE
 #endif