rpmsg: glink: use put_device() if device_register fail

if device_register() returned an error! Always use put_device()
to give up the reference initialized. And unregister device for
other return error.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

drivers/rpmsg/qcom_glink_smem.c

@@ -217,6 +217,7 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
 	ret = device_register(dev);
 	if (ret) {
 		pr_err("failed to register glink edge\n");
+		put_device(dev);
 		return ERR_PTR(ret);
 	}
 
@@ -299,7 +300,7 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
 	return glink;
 
 err_put_dev:
-	put_device(dev);
+	device_unregister(dev);
 
 	return ERR_PTR(ret);
 }