ASoC: codecs: ES8326: Solving headphone detection and

ASoC: codecs: ES8326: Solving headphone detection and

Merge series from Zhang Yi <zhangyi@everest-semi.com>:

We propose four patches to solve headphone detection and suspend issues.
And there are several registers that should be read-only registers. So
we create es8326_writeable_register, and set these registers to false.