stm32/dma: Remove H7 SDMMC DMA descriptors.
stm32/dma: Remove H7 SDMMC DMA descriptors.

The H7 SD peripheral has direct connection to MDMA instead.

tobbad/micropython,trezor/micropython,ryannathans/micropython,adafruit/micropython,tobbad/micropython,MrSurly/micropython,MrSurly/micropython,selste/micropython,kerneltask/micropython,henriknelson/micropython,pramasoul/micropython,bvernoux/micropython,pfalcon/micropython,pozetroninc/micropython,dmazzella/micropython,kerneltask/micropython,ryannathans/micropython,bvernoux/micropython,selste/micropython,adafruit/micropython,pramasoul/micropython,tralamazza/micropython,selste/micropython,pfalcon/micropython,henriknelson/micropython,kerneltask/micropython,henriknelson/micropython,adafruit/circuitpython,trezor/micropython,henriknelson/micropython,ryannathans/micropython,tralamazza/micropython,dmazzella/micropython,dmazzella/micropython,pfalcon/micropython,adafruit/micropython,selste/micropython,adafruit/circuitpython,pfalcon/micropython,trezor/micropython,pozetroninc/micropython,MrSurly/micropython,trezor/micropython,tobbad/micropython,henriknelson/micropython,ryannathans/micropython,pramasoul/micropython,swegener/micropython,adafruit/micropython,swegener/micropython,tobbad/micropython,swegener/micropython,selste/micropython,kerneltask/micropython,adafruit/circuitpython,ryannathans/micropython,adafruit/circuitpython,bvernoux/micropython,tralamazza/micropython,pozetroninc/micropython,dmazzella/micropython,bvernoux/micropython,kerneltask/micropython,pozetroninc/micropython,pozetroninc/micropython,swegener/micropython,MrSurly/micropython,adafruit/circuitpython,swegener/micropython,pfalcon/micropython,trezor/micropython,bvernoux/micropython,tobbad/micropython,tralamazza/micropython,adafruit/micropython,adafruit/circuitpython,pramasoul/micropython,pramasoul/micropython,MrSurly/micropython