ARM: dts: exynos5410: add hdmiphy and HDMI dt node for odroid-xu

hdmi drive dt node provides phy property which points to
the hdmiphy node.
ARM: dts: exynos5410: add hdmi and mixer dt node for exynos5410
drm/exynos: add support for exynos5410 hdmi

Add support for exynos5410 hdmi ip.
drm/exynos: add support for exynos5410 hdmiphy

Add support for exynos5410 hdmiphy which is add hdmi configs.
clk: exynos5410: add dpll clocks
ARM: exynos5410: add dt support for gsc

This patch adds G-sclater devices to the DT device list.
clk: exynos5410: modify clocks for hdmi
Revert "drm/exynos: hdmi: Disable HPD support"

This reverts commit 30080b00b4faf8e5c3ed36d5fb4ef6fbc4f4e4cb.