Ryan f3ac792c09 Align ChibiOS spi_master behaviour with AVR (#11404)
* Align ChibiOS spi_master behaviour with AVR

* Rollback `spi_transmit()` and `spi_receive()` to preserve DMA
2021-01-03 14:53:53 +11:00
..
2020-12-14 05:50:50 +11:00