* support dma chunk sizes other than 4092
* fmt
* update CHANGELOG
* fix 0 size static assert
* review changes:
- `.div_ceil()`
- return errors for bad chunk size and buffer sizes in Mem2Mem constructors
- correct 0 chunk size check in descripter macros
* dma: clear the mem2mem bit when channel is configured instead of in Drop
* dma: add Mem2Mem to support memory to memory transfer
* fmt
* update CHANGELOG
* removed some debugging
* use "gdma" as the selector for support
* fix empty else
* clippy
* Mem2Mem::new now accepts the peripheral to use
* mark Mem2Mem::new() unsafe
* fmt :-/
* add Mem2MemN values for gdma on non-esp32s3
tested on esp32c3,esp32c6 (will have an esp32h2 in a few days)
* support the esp32c2 (esp8684)
* DmaEligible trait providing dma peripheral value & safe constructor for Mem2Mem dma.
* added hil-test for Mem2Mem
* fmt dma_mem2mem test
* remove `debug!()`
* reset the mem2mem bit (mem_trans_en) in in_conf0 on drop
