ASoC: tlv320aic26: Replace sprintf() with sysfs_emit()

For sysfs outputs, it's safer to use a new helper, sysfs_emit(),
instead of the raw sprintf() & co.  This patch replaces the sprintf()
usage straightforwardly with a new helper, sysfs_emit().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20220801170108.26340-3-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/tlv320aic26.c

@@ -271,7 +271,7 @@ static ssize_t keyclick_show(struct device *dev,
 	freq = (125 << ((val >> 8) & 0x7)) >> 1;
 	len = 2 * (1 + ((val >> 4) & 0xf));
 
-	return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
+	return sysfs_emit(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
 }
 
 /* Any write to the keyclick attribute will trigger the keyclick event */