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fsl_sai: disable irqs during AC97 register access

Marc-Oliver Westerburg requested to merge fsl_sai_disabled_irqs_during_ac97read into linux-5.15.32-seco

If interrupts occur after enabling the SAI RMR but before enabling the SAI TMR during AC97 read register accesses, the FIFO can run full of empty frames and we are not able to receive the expected answer from the codec. Therefore this patch disables IRQs for the current CPU during this critical step.

BCS: 746-001295

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