spi: Updates for v4.3 A few core tweaks this time together with the usual collection of driver specific updates and fixes plus a larger than average selection of new device support: - Fix DMA mapping of unaligned vmalloc() buffers. - Statistics tracking transfer volumes exposed via sysfs. - New drivers for Freescale MPC5125, Intel Sunrise Point, Mediatek SoCs, and Netlogic XLP SoCs.