I2s extmod

[jaenrig-ifx]

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https://github.com/Infineon/.github/blob/master/CONTRIBUTING.md
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CONTRIBUTING.md also tells you what to expect in the PR process.

Description
I2S implemented in term extmod enablement based on DMA transfers.

Minor refinements and cleanups expected in the pending i2s tickets.

[github-actions]

Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS

[NikhitaR-IFX]

All good! 🙌

[IFX-Anusha]

Nice 🚀

[jaenrig-ifx]

Thanks for the review @NikhitaR-IFX @ramya-subramanyam ! Changes now implemented.

[ramya-subramanyam]

looks good !