mfd: davinci_voicecodec: Remove unused read and write functions

These functions are not referenced anywhere, nor prototyped, so just
remove them.
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/davinci_voicecodec.c

@@ -32,17 +32,6 @@
 
 #include <linux/mfd/davinci_voicecodec.h>
 
-u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
-{
-	return __raw_readl(davinci_vc->base + reg);
-}
-
-void davinci_vc_write(struct davinci_vc *davinci_vc,
-					   int reg, u32 val)
-{
-	__raw_writel(val, davinci_vc->base + reg);
-}
-
 static int __init davinci_vc_probe(struct platform_device *pdev)
 {
 	struct davinci_vc *davinci_vc;