Pick some patches and fixes from Renesas v4.9/rcar-3.5.8 BSP to make spi on RCar3 more reliably.
Patches are done against renesas-drivers-2017-09-05-v4.13. Should we consider spi: sh-msiof: Fix DMA transfer size check spi: sh-msiof: Fix MSIOF address for DMAC for -stable? Both have been introduced with b0d0ce8b6b91a0f6f99045b6019 spi: sh-msiof: Add DMA support v3.17 Best regards Dirk
