usb: gadget: r8a66597-udc: use devm_request_irq() to get device irq

Use the devm_request_irq() call to get the interrupt for the
device and have it automatically free on exit.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/r8a66597-udc.c

@@ -1826,7 +1826,6 @@ static int __exit r8a66597_remove(struct platform_device *pdev)
 
 	usb_del_gadget_udc(&r8a66597->gadget);
 	del_timer_sync(&r8a66597->timer);
-	free_irq(platform_get_irq(pdev, 0), r8a66597);
 	r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
 
 	if (r8a66597->pdata->on_chip) {
@@ -1918,8 +1917,8 @@ static int __init r8a66597_probe(struct platform_device *pdev)
 
 	disable_controller(r8a66597); /* make sure controller is disabled */
 
-	ret = request_irq(irq, r8a66597_irq, IRQF_SHARED,
-			udc_name, r8a66597);
+	ret = devm_request_irq(dev, irq, r8a66597_irq, IRQF_SHARED,
+			       udc_name, r8a66597);
 	if (ret < 0) {
 		dev_err(dev, "request_irq error (%d)\n", ret);
 		goto clean_up2;
@@ -1969,7 +1968,6 @@ static int __init r8a66597_probe(struct platform_device *pdev)
 err_add_udc:
 	r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
 clean_up3:
-	free_irq(irq, r8a66597);
 clean_up2:
 	if (r8a66597->pdata->on_chip)
 		clk_disable_unprepare(r8a66597->clk);