wm8350-regulator: fix wm8350_register_regulator error handling

In the case of platform_device_add() fail, we should call
platform_device_put() instead of platform_device_del()

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Mark Brown <[e-mail]>
Signed-off-by: Liam Girdwood <[e-mail]>

drivers/regulator/wm8350-regulator.c

···
 	if (ret != 0) {
 		dev_err(wm8350->dev, "Failed to register regulator %d: %d\n",
 			reg, ret);
-		platform_device_del(pdev);
+		platform_device_put(pdev);
 		wm8350->pmic.pdev[reg] = NULL;
 	}