spmi: hisi-spmi-controller: Use devm_spmi_controller_add()

Convert to the device-managed version of spmi_controller_add() and
delete the unnecessary driver remove callback.
Signed-off-by: Fei Shao <fshao@chromium.org>
Link: https://lore.kernel.org/r/20230824104101.4083400-5-fshao@chromium.orgSigned-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20231206231733.4031901-7-sboyd@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/spmi/hisi-spmi-controller.c

@@ -308,7 +308,7 @@ static int spmi_controller_probe(struct platform_device *pdev)
 	ctrl->read_cmd = spmi_read_cmd;
 	ctrl->write_cmd = spmi_write_cmd;
 
-	ret = spmi_controller_add(ctrl);
+	ret = devm_spmi_controller_add(&pdev->dev, ctrl);
 	if (ret) {
 		dev_err(&pdev->dev, "spmi_controller_add failed with error %d!\n", ret);
 		return ret;
@@ -317,13 +317,6 @@ static int spmi_controller_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void spmi_del_controller(struct platform_device *pdev)
-{
-	struct spmi_controller *ctrl = platform_get_drvdata(pdev);
-
-	spmi_controller_remove(ctrl);
-}
-
 static const struct of_device_id spmi_controller_match_table[] = {
 	{
 		.compatible = "hisilicon,kirin970-spmi-controller",
@@ -334,7 +327,6 @@ MODULE_DEVICE_TABLE(of, spmi_controller_match_table);
 
 static struct platform_driver spmi_controller_driver = {
 	.probe		= spmi_controller_probe,
-	.remove_new	= spmi_del_controller,
 	.driver		= {
 		.name	= "hisi_spmi_controller",
 		.of_match_table = spmi_controller_match_table,