Fix typos in usb.c, llist_irqsafe.h and dfu.h
diff --git a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
index 87ac060..2a44602 100644
--- a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
+++ b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
@@ -78,8 +78,8 @@
/* no DFU bootloader is being used */
#define DFURT_NUM_IF 0
-#define DFURT_IF_DESCRIPTOR_STRUCT(a, b)
-#define DFURT_IF_DESCRIPTOR
+#define DFURT_IF_DESCRIPTOR_STRUCT
+#define DFURT_IF_DESCRIPTOR(a, b)
#endif /* BOARD_USB_DFU */