Daniel Agar 8738c26426
boards: enable NuttX SPI DMA buffers
- update to NuttX with stm32f4 and stm32f7 SPI DMA internal buffers
 - remove explicit DMA buffer allocations from new IMU drivers
 - restore original BOARD_DMA_ALLOC_POOL_SIZE
 - decrease SPI DMA thresholds based on fmu-v2/v3/v4/v5 bench testing
2020-03-22 19:24:26 -04:00
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2020-01-13 14:07:03 -05:00
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