Samsung DTS ARM changes for v6.3

1. Big cleanup and rework towards achieving zero-warning of dtbs_check
   and dtc W=1:
    - align node names with the bindings,
    - drop or correct incorrect properties in several boards,
    - correct HDMI bridge ports nodes on Exynos4412 Midas,
    - add dummy regulator supplies when necessary to fullfil bindings
      requirements,
    - use lowercase hex,
    - move non-MMIO exynos-bus nodes out of soc node,
    - add unit address to USB DWC3 nodes.

2. Correct Exynos5420 MIPI DSI and phy compatibles.
3. Correct Exynos4210 and Exynos4412 HDMI phy compatibles.
4. Add Samsung Galaxy S5 (SM-G900H) board.