usb: gadget: udc: renesas_usb3: move pm_runtime_{en,dis}able()

This patch moves pm_runtime_{en,dis}able() call timing to
renesas_usb3_{probe,remove}() for supporting PM_SLEEP feature in
the future.
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
[shimoda: Revise the commit log]
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/gadget/udc/renesas_usb3.c

@@ -2239,7 +2239,6 @@ static int renesas_usb3_start(struct usb_gadget *gadget,
 	/* hook up the driver */
 	usb3->driver = driver;
 
-	pm_runtime_enable(usb3_to_dev(usb3));
 	pm_runtime_get_sync(usb3_to_dev(usb3));
 
 	renesas_usb3_init_controller(usb3);
@@ -2257,7 +2256,6 @@ static int renesas_usb3_stop(struct usb_gadget *gadget)
 	renesas_usb3_stop_controller(usb3);
 
 	pm_runtime_put(usb3_to_dev(usb3));
-	pm_runtime_disable(usb3_to_dev(usb3));
 
 	return 0;
 }
@@ -2405,6 +2403,7 @@ static int renesas_usb3_remove(struct platform_device *pdev)
 	renesas_usb3_dma_free_prd(usb3, &pdev->dev);
 
 	__renesas_usb3_ep_free_request(usb3->ep0_req);
+	pm_runtime_disable(usb3_to_dev(usb3));
 
 	return 0;
 }
@@ -2640,6 +2639,7 @@ static int renesas_usb3_probe(struct platform_device *pdev)
 	renesas_usb3_debugfs_init(usb3, &pdev->dev);
 
 	dev_info(&pdev->dev, "probed\n");
+	pm_runtime_enable(usb3_to_dev(usb3));
 
 	return 0;