ASoC: soc-pcm: rename .pmdown_time to .use_pmdown_time for Component

commit fbb16563c6c2 ("ASoC: snd_soc_component_driver has pmdown_time")
added new .pmdown_time which is for inverted version of current
.ignore_pmdown_time
But it is confusable name. Let's rename it to .use_pmdown_time

Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 1a73232..812ae4f 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -836,7 +836,7 @@
 	/* bits */
 	unsigned int idle_bias_on:1;
 	unsigned int suspend_bias_off:1;
-	unsigned int pmdown_time:1; /* care pmdown_time at stop */
+	unsigned int use_pmdown_time:1; /* care pmdown_time at stop */
 	unsigned int endianness:1;
 	unsigned int non_legacy_dai_naming:1;
 };