msm: mpq8064: Add support to enable 100KHz level shifter

cs8427 chip will be functional at i2c 100KHz frequency and
3.3 to 5V to enable this level shifter should be enabled

Change-Id: I4d30c597edc3367be89280edc85e2a272a67ae1e
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
diff --git a/include/sound/cs8427.h b/include/sound/cs8427.h
index cf7903a..2004ec3 100644
--- a/include/sound/cs8427.h
+++ b/include/sound/cs8427.h
@@ -209,6 +209,7 @@
 	int irq_base;
 	int num_irqs;
 	int reset_gpio;
+	int (*enable) (int enable);
 };
 
 struct snd_pcm_substream;