GPIO descriptor cleanup for some Wolfson codecs

Merge series from Linus Walleij <linus.walleij@linaro.org>:

This converts the remaining Wolfson ASoC codecs to
use GPIO descriptors.

These Wolfson codecs are mostly used with different
Samsung S3C (especially Cragganmore 6410) board files,
so the in-tree users are fixed up in the process.