CHROMIUM: ASoC: Byt-max98090: Add byt_max98090_stop method

Put the codec into shutdown when all streams have been stopped.

Change-Id: I78c5366bc4f46f23321f8b7a34c11618a85f6db4
Signed-off-by: Kevin Strasser <kevin.strasser@intel.com>
CHROMIUM: Revert "ASoC: Maxim98090: Use PLL locking delays as specified in datasheet"

This reverts commit 86ce33394363f3c8f11dab7a75fccd3f2a104703.

The extra delay is needed in the chrome os kernel

Change-Id: Id849ec6944150fa2da737e42c73d6aa8627d2172
Signed-off-by: Kevin Strasser <kevin.strasser@intel.com>