Add SpiDmaBus::split for moving between manual & automatic DMA buffers
#4020
| Job | Run time |
|---|---|
| 1m 28s | |
| 1m 34s | |
| 1m 38s | |
| 1m 45s | |
| 2m 13s | |
| 1m 47s | |
| 4m 0s | |
| 4m 5s | |
| 4m 54s | |
| 3m 48s | |
| 4m 17s | |
| 3m 33s | |
| 4m 20s | |
| 5m 16s | |
| 6m 35s | |
| 6m 5s | |
| 57m 18s |