usb: musb: tusb6010: use platform_device_unregister in tusb_remove()

platform_device_unregister() only calls platform_device_del() and
platform_device_put(), thus use platform_device_unregister() to
simplify the code.

Also the documents in platform.c shows that platform_device_del
and platform_device_put must _only_ be externally called in error
cases.  All other usage is a bug.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 39ece28..4454561 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -1233,8 +1233,7 @@
 	struct tusb6010_glue		*glue = platform_get_drvdata(pdev);
 
 	musb_put_id(&pdev->dev, glue->musb->id);
-	platform_device_del(glue->musb);
-	platform_device_put(glue->musb);
+	platform_device_unregister(glue->musb);
 	kfree(glue);
 
 	return 0;