spi: Updates for v3.19 Not a huge amount going on this release, mainly new drivers (there's a couple more waiting that didn't quite make the cut for this release too): - An interface for querying if the current transfer is the last in a message, allowing controllers that need special handling for the final transfer to use the core message parsing. - Support for Amlogic Meson SPIFC, Imagination Technologies SFPI, Intel Quark X1000 and Samsung Exynos 7 controllers.