ASoC: tlv320aic26: use DEVICE_ATTR_RW macro

Use DEVICE_ATTR_RW() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Message-Id: <20210524115131.46288-1-yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@sirena.org.uk>

sound/soc/codecs/tlv320aic26.c

@@ -261,7 +261,7 @@ static const struct snd_kcontrol_new aic26_snd_controls[] = {
  * SPI device portion of driver: sysfs files for debugging
  */
 
-static ssize_t aic26_keyclick_show(struct device *dev,
+static ssize_t keyclick_show(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
 	struct aic26 *aic26 = dev_get_drvdata(dev);
@@ -276,7 +276,7 @@ static ssize_t aic26_keyclick_show(struct device *dev,
 }
 
 /* Any write to the keyclick attribute will trigger the keyclick event */
-static ssize_t aic26_keyclick_set(struct device *dev,
+static ssize_t keyclick_store(struct device *dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
 {
@@ -288,7 +288,7 @@ static ssize_t aic26_keyclick_set(struct device *dev,
 	return count;
 }
 
-static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
+static DEVICE_ATTR_RW(keyclick);
 
 /* ---------------------------------------------------------------------
  * SoC CODEC portion of driver: probe and release routines