ASoC: Move IO functions to soc-io.c

soc-core.c is getting quite crowded. Move all IO related functions that are
still in soc-core.c to soc-io.c

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/soc-core.c
Simple merge

diff --cc sound/soc/soc-io.c
Simple merge