[riot-notifications] [RIOT-OS/RIOT] boards/stm32f4: Remove incorrect UART DMA config from stm32f4 boards (#14090)
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Fri May 15 19:20:27 CEST 2020
> The dma attribute in the common uart configuration struct should be called dma_stream, to match what is in the board configurations.
it's the `dma` that is used in the uart implementation, so ok to change the boards configurations. But you still have to keep `dma_chan`:
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