ASoC: Remove LZO cache type

There are no current users and new drivers ought to be using the regmap
API and its cache implementation directly so just delete the ASoC copy.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

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

diff --cc sound/soc/Kconfig
Simple merge

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