Enable full-duplex I2S for spi_v2 devices using I2SEXT peripherals#5773

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Commits on Feb 21, 2026

Add I2SEXT peripheral traits for STM32F405

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Add I2SEXT full-duplex support for spi_v2 on STM32F405

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Widen I2S new_full_duplex cfg gate to include spi_v1

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