ASoC: core: add SND_SOC_BYTES_E

Add SND_SOC_BYTES_E to accept getter and putter.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20191120060844.224607-2-tzungbi@google.com


Signed-off-by: Mark Brown <broonie@kernel.org>