ASoC: rt5670/cht_bsw_rt5672: Some bugfixes and cleanups

[Hans de Goede]

Hi All,

This series is mainly the result of me working on fixing the extra
set of speakers in the Lenovo Miix 2 10 kbd dock not working with
Linux (patches 1 and 3) while working on this I noticed some other
bugs (patches 2 and 4) and I also ended up doing some generic
cleanups (patches 5 and 6). For patches 1-3 or 1-4 it would be
nice it they can go to a future 5.8-rc# 5-6 are mostly -next
material.

Regards,

Hans