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Merge series from Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>: A "known issue" during implementation of SE DMA for spi geni driver was that it does DMA map/unmap internally instead of in spi framework. Current patches remove this hiccup and also clean up code a bit. Testing revealed no regressions and results with 1000 iterations of reading from EC showed no loss of performance. Results ======= Before - Iteration 999, min=5.10, max=5.17, avg=5.14, ints=25129 After - Iteration 999, min=5.10, max=5.20, avg=5.15, ints=25153