shared/tinyusb: Further refactor static USB device implementation.

App the mp_ prefix to usbd_ symbols and files which are defined here and
not in TinyUSB.

rp2 only for now. This includes some groundwork for dynamic USB devices
(defined in Python).

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

shared/tinyusb/mp_usbd_internal.h

@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Angus Gratton
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_SHARED_TINYUSB_MP_USBD_INTERNAL_H
+#define MICROPY_INCLUDED_SHARED_TINYUSB_MP_USBD_INTERNAL_H
+#include "tusb.h"
+
+// Static USB device descriptor values
+extern const tusb_desc_device_t mp_usbd_desc_device_static;
+extern const uint8_t mp_usbd_desc_cfg_static[USBD_STATIC_DESC_LEN];
+
+#endif // MICROPY_INCLUDED_SHARED_TINYUSB_MP_USBD_INTERNAL_H