usb: musb: omap2430: add missing platform_device_put() on error in omap2430_probe()

Add the missing platform_device_put() before return from
omap2430_probe() in the error handling case.

Introduced by commit ca784be3
(usb: start using the control module driver)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/omap2430.c

@@ -549,7 +549,8 @@ static int omap2430_probe(struct platform_device *pdev)
 		glue->control_otghs = omap_get_control_dev();
 		if (IS_ERR(glue->control_otghs)) {
 			dev_vdbg(&pdev->dev, "Failed to get control device\n");
-			return -ENODEV;
+			ret = PTR_ERR(glue->control_otghs);
+			goto err2;
 		}
 	} else {
 		glue->control_otghs = ERR_PTR(-ENODEV);