usb: gadget: udc: replace kzalloc with devm_kzalloc in mv_udc_probe

This driver uses the unified memory management api, so replace
kzalloc with devm_kzalloc to avoid a memory leak.
Reported-by: Dongliang Mu <mudongliangabcd@gmail.com>
Link: https://lore.kernel.org/all/CAD-N9QX5i5toj8cs7DxBjYWtRGf3ZRnfTAf809sFW6iX0Ktfmw@mail.gmail.comSigned-off-by: Kang Chen <void0red@gmail.com>
Link: https://lore.kernel.org/r/20230225041149.136-2-void0red@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/mv_udc_core.c

@@ -2229,7 +2229,7 @@ static int mv_udc_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&udc->status_req->queue);
 
 	/* allocate a small amount of memory to get valid address */
-	udc->status_req->req.buf = kzalloc(8, GFP_KERNEL);
+	udc->status_req->req.buf = devm_kzalloc(&pdev->dev, 8, GFP_KERNEL);
 	if (!udc->status_req->req.buf) {
 		retval = -ENOMEM;
 		goto err_destroy_dma;