Samsung DeviceTree updates and improvements for v4.6: 1. Add SROM controller device nodes. 2. Add Ethernet chip as child of SROM controller on SMDK5410. 3. Allow simultaneous usage exynos-rng and s5p-sss drivers on Exynos5. 4. Cleanup CPU configuration on Exynos542x/5800. 5. Add necessary nodes for cpufreq-dt driver on Exynos542x/5800 (OPPs, regulator supplies) which allows frequency and voltage scalling of this SoC. 6. Minor cleanups.