ASoC: Add missed BCLK rate to WM5100 driver

Reported-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm5100.c b/sound/soc/codecs/wm5100.c
index 443d76d..cb940a8 100644
--- a/sound/soc/codecs/wm5100.c
+++ b/sound/soc/codecs/wm5100.c
@@ -1511,6 +1511,7 @@
 	96000,
 	128000,
 	192000,
+	256000,
 	384000,
 	512000,
 	768000,