pinctrl: stm32: Switch to use dev_err_probe() helper

In the probe path, dev_err() can be replace with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220917122015.1893880-1-yangyingliang@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Yang Yingliang

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -1603,10 +1603,9 @@ int stm32_pctl_probe(struct platform_device *pdev)
 
 		bank->clk = of_clk_get_by_name(np, NULL);
 		if (IS_ERR(bank->clk)) {
-			if (PTR_ERR(bank->clk) != -EPROBE_DEFER)
-				dev_err(dev, "failed to get clk (%ld)\n", PTR_ERR(bank->clk));
 			fwnode_handle_put(child);
-			return PTR_ERR(bank->clk);
+			return dev_err_probe(dev, PTR_ERR(bank->clk),
+					     "failed to get clk\n");
 		}
 		i++;
 	}