iio: frequency: adf4377: Switch to device_property_match_property_string()

Replace open coded device_property_match_property_string().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230808162800.61651-4-andriy.shevchenko@linux.intel.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/frequency/adf4377.c

@@ -870,7 +870,6 @@ static const struct iio_chan_spec adf4377_channels[] = {
 static int adf4377_properties_parse(struct adf4377_state *st)
 {
 	struct spi_device *spi = st->spi;
-	const char *str;
 	int ret;
 
 	st->clkin = devm_clk_get_enabled(&spi->dev, "ref_in");
@@ -896,16 +895,13 @@ static int adf4377_properties_parse(struct adf4377_state *st)
 		return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2),
 				     "failed to get the CE GPIO\n");
 
-	ret = device_property_read_string(&spi->dev, "adi,muxout-select", &str);
-	if (ret) {
-		st->muxout_select = ADF4377_MUXOUT_HIGH_Z;
-	} else {
-		ret = match_string(adf4377_muxout_modes, ARRAY_SIZE(adf4377_muxout_modes), str);
-		if (ret < 0)
-			return ret;
-
+	ret = device_property_match_property_string(&spi->dev, "adi,muxout-select",
+						    adf4377_muxout_modes,
+						    ARRAY_SIZE(adf4377_muxout_modes));
+	if (ret >= 0)
 		st->muxout_select = ret;
-	}
+	else
+		st->muxout_select = ADF4377_MUXOUT_HIGH_Z;
 
 	return 0;
 }