Input: gpio_keys_polled - simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230625162817.100397-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/gpio_keys_polled.c

@@ -299,13 +299,9 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 							     NULL, GPIOD_IN,
 							     button->desc);
 			if (IS_ERR(bdata->gpiod)) {
-				error = PTR_ERR(bdata->gpiod);
-				if (error != -EPROBE_DEFER)
-					dev_err(dev,
-						"failed to get gpio: %d\n",
-						error);
 				fwnode_handle_put(child);
-				return error;
+				return dev_err_probe(dev, PTR_ERR(bdata->gpiod),
+						     "failed to get gpio\n");
 			}
 		} else if (gpio_is_valid(button->gpio)) {
 			/*