Add support for firmware update

src/device-update-firmware.h

@@ -0,0 +1,9 @@
+// SPDX-FileCopyrightText: 2024 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <gtk/gtk.h>
+#include "alsa.h"
+
+void create_update_firmware_window(GtkWidget *w, struct alsa_card *card);