uart DMA listen and DMA transmit

[michalcourson]

Current Uart handler does not support having DMA reception in listening mode, and also using DMA to do transmissions. As written, Tx dma jobs will always be queued as dma_active_peripheral_ is always set in listening mode, and the Tx job never gets dequeued

I was able to get it to work for my setup by pinning the HalUartDmaRxStreamCallback to use USART_1 always, taking out the dma job queueing in DMATransmit, and taking out the wait on HAL_UART_GetState(&huart_). I also had to call DmaListenStop before starting the transmit, and could call DmaListenStart pretty much immediately after.