Serial DMA for STM32H7#27633

thinkyhead merged 2 commits intoMarlinFirmware:bugfix-2.1.xMarlinFirmware/Marlin:bugfix-2.1.xfrom

rondlh:SERIAL-DMA-STM32H7rondlh/Marlin-CAN_HOST:SERIAL-DMA-STM32H7Copy head branch name to clipboard