ASoC: Remove snd_soc_bulk_write_raw()

No users of snd_soc_bulk_write_raw() are left and new drivers are going to use
regmap directly for this, so the function can be removed.

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

diff --cc include/sound/soc.h
Simple merge

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

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