Update usb functions for new reg headers
diff --git a/sw/lib/usbdev.c b/sw/lib/usbdev.c
index 96d6b55..8814766 100644
--- a/sw/lib/usbdev.c
+++ b/sw/lib/usbdev.c
@@ -41,7 +41,7 @@
 }
 
 uint32_t *usbdev_buf_idtoaddr(usbdev_ctx_t *ctx, usbbufid_t buf) {
-  return (uint32_t *)(USBDEV_BUFFER(USBDEV_BASE_ADDR) + (buf * BUF_LENGTH));
+  return (uint32_t *)(USBDEV_BUFFER() + (buf * BUF_LENGTH));
 }
 
 void usbdev_buf_copyto_byid(usbdev_ctx_t *ctx, usbbufid_t buf, const void *from,