Armando f0e93ed0f8 psram: reserve dma pool in the step of heap max block ...

As heap block may be allocated into multiple non-contiguous chunks, to
reserve enough memory for dma/internal usage, we do the malloc in the
step of max available block.

On ESP32 we use this way, this commit follows this way, on ESP32S2 and
ESP32S3

2022-06-30 10:18:20 +00:00

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