usb: musb: dsps: use platform_device_unregister in dsps_delete_musb_pdev()

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>

drivers/usb/musb/musb_dsps.c

@@ -565,8 +565,7 @@ err0:
 static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id)
 {
 	musb_put_id(glue->dev, glue->musb[id]->id);
-	platform_device_del(glue->musb[id]);
-	platform_device_put(glue->musb[id]);
+	platform_device_unregister(glue->musb[id]);
 }
 
 static int __devinit dsps_probe(struct platform_device *pdev)