ARM: SoC: late cleanups These could not be part of the first cleanup branch, because they either came too late in the cycle, or they have dependencies on other branches. Important changes are: * The integrator platform is almost multiplatform capable after some reorganization (Linus Walleij) * Minor cleanups on Zynq (Michal Simek) * Lots of changes for Exynos and other Samsung platforms, including further preparations for multiplatform support and the clocks bindings are rearranged.