ARM: dts: add hdmi regulators for exynos5800-peach-pi

Adding regulators for HDMI for Peach-pi board.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>