ASoC: Don't squash 16x8 registers down to 8 bits

Currently we'll force all registers to fit in 8 bits before passing
down to the I/O function. Looks like a cut'n'paste bug.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

sound/soc/soc-cache.c

@@ -319,7 +319,6 @@ static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg,
 	data[0] = (reg >> 8) & 0xff;
 	data[1] = reg & 0xff;
 	data[2] = value;
-	reg &= 0xff;
 
 	return do_hw_write(codec, reg, value, data, 3);
 }