[PATCH v2 0/3] arm64: add new support Samsung GH7 SoC and SSDK board

[Kukjin Kim]

This adds support for Samsung ARMv8 core based GH7 SoC and its evaluation SSDK
board.

Changes since v1:
- remove model and compatible in dtsi
- remove inclusion /dts-v1/ in dtsi
- add aliase for serial0
- remove compatible cortex-a9-gic for gic
- remove clock-frequncy for timer
- change number of address-cells and size-cells to 2
- enable ARCH_GH7 in single defconfig for arm64

There were many comments for SoC vendor's Kconfig entry but now I have no
choice except adding ARCH_GH7 and enabling it in current single defconfig
for arm64 by default.

[PATCH v2 1/3] arm64: dts: add initial dts for Samsung GH7 SoC and SSDK-GH7 board
[PATCH v2 2/3] arm64: defconfig: Enable ARCH_GH7 by default
[PATCH v2 3/3] Documentation: DT: add new entry for Samsung GH7 SoC and SSDK board