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Integrate linux-imx-kuk/ac97_bus_scan_retry

Commit: seco-ne/kernel/linux-imx-kuk@6ad2a6b3

bus:ac97: Added retry to AC97 bus scan

We currently encounter timeouts on the AC97 bus from time to time. If a timeout occurs for the ID request of a AC97 codec, the codec isn't detected by the controller. Added a retry around the controller bus scan function, that scans the bus for up to three times, if no codec was detected.

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