Glenn Ruben Bakke 67fd67f549 nrf/modules/machine/spi: SPIM (EasyDMA) backend for nrf52x
This patch moves all nrf52 targets to use SPIM backend
for SPI which features EasyDMA. The main benefit of doing
this is to utilize the SPIM3 on nrf52840 which is
EasyDMA only peripheral.
2018-07-18 17:12:26 +10:00
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