linux-phytec-ti

ARM: dts: am437x-gp-evm: add HDMI support

Add HDMI support for AM437x GP EVM. The HDMI uses SiI9022 HDMI encoder,
and is mutually exclusive with the LCD. The choice between LCD and HDMI
is made by booting either with am437x-gp-evm.dtb or
am437x-gp-evm-hdmi.dtb.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>