Integrate linux-imx-kuk/add_reset_ac97
Commit: seco-ne/kernel/linux-imx-kuk@b514aff5
dts:mc3: Added gpio-controller attribute to GPIO-Expander
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Commit: seco-ne/kernel/linux-imx-kuk@5edd2a45
bus:ac97: Added reset to retry-loop of bus scan
We rescan the bus for up to five times, if we don't find any codec. Because we had issues with a quirky codec, a cold reset was added in-between the retries.