Input: resistive-adc-touch - 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>
Link: https://lore.kernel.org/r/20230625162817.100397-18-krzysztof.kozlowski@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/resistive-adc-touch.c

@@ -210,12 +210,8 @@ static int grts_probe(struct platform_device *pdev)
 
 	/* get the channels from IIO device */
 	st->iio_chans = devm_iio_channel_get_all(dev);
-	if (IS_ERR(st->iio_chans)) {
-		error = PTR_ERR(st->iio_chans);
-		if (error != -EPROBE_DEFER)
-			dev_err(dev, "can't get iio channels.\n");
-		return error;
-	}
+	if (IS_ERR(st->iio_chans))
+		return dev_err_probe(dev, PTR_ERR(st->iio_chans), "can't get iio channels\n");
 
 	if (!device_property_present(dev, "io-channel-names"))
 		return -ENODEV;