ASoC: Intel: skylake: 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 those usages
straightforwardly with a new helper, sysfs_emit().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220801170108.26340-6-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-nhlt.c

@@ -61,7 +61,7 @@ static ssize_t platform_id_show(struct device *dev,
 			nhlt->header.oem_revision);
 
 	skl_nhlt_trim_space(platform_id);
-	return sprintf(buf, "%s\n", platform_id);
+	return sysfs_emit(buf, "%s\n", platform_id);
 }
 
 static DEVICE_ATTR_RO(platform_id);