Samsung DTS ARM changes for v4.17 1. Add WiFi to Artik 5 board. 2. Remove unused samsung_k3pe0e000b memory DTSI. 3. Add few remaining SPDX license identifiers. 4. Refactor Exynos4 by using labels for overriding/extending nodes and moving respective nodes under the 'soc' node. 5. Add three new Exynos4412-based boards: GT-I9300 (Samsung Galaxy S3), GT-I9305 (Samsung Galaxy S3 LTE) and GT-N7100/N7105 (Samsung Note 2). They are based heavily on existing Trats2 board. 6. Fix PMIC interrupts on Trats board. 7. Fix IOMMU for GScaler devices on Exynos5250. 8. Minor fixes in unit addresses pointed by DTC. 9. Minor cleanups from unused properties and duplicated code.