ASoC: sn95031: Do not use static variable for channel_index

No reason to use static variable for channel_index.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/sn95031.c b/sound/soc/codecs/sn95031.c
index 8f8ce5f..5c5a4ab 100644
--- a/sound/soc/codecs/sn95031.c
+++ b/sound/soc/codecs/sn95031.c
@@ -102,7 +102,7 @@
 {
 	int base_addr, chnl_addr;
 	int value;
-	static int channel_index;
+	int channel_index;
 
 	/* Index of the first channel in which the stop bit is set */
 	channel_index = find_free_channel(sn95031_codec);