usb: gadget: push VID/PID/USB BCD module option into gadgets

This patch moves the module options idVendor, idProduct and bcdDevice
from composite.c into each gadgets. This ensures compatibility with
current gadgets and removes the global variable which brings me step
closer towards composite.c in libcomposite

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/audio.c

@@ -13,6 +13,7 @@
 
 #include <linux/kernel.h>
 #include <linux/utsname.h>
+#include <linux/usb/composite.h>
 
 #include "gadget_chips.h"
 #define DRIVER_DESC		"Linux USB Audio Gadget"
@@ -28,6 +29,7 @@
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
 #include "composite.c"
+USB_GADGET_COMPOSITE_OPTIONS();
 
 /* string IDs are assigned dynamically */
 
@@ -174,6 +176,7 @@ static int __init audio_bind(struct usb_composite_dev *cdev)
 	status = usb_add_config(cdev, &audio_config_driver, audio_do_config);
 	if (status < 0)
 		goto fail;
+	usb_composite_overwrite_options(cdev, &coverwrite);
 
 	INFO(cdev, "%s, version: %s\n", DRIVER_DESC, DRIVER_VERSION);
 	return 0;