ARM64: dts: rk3399: evb1-cros: disabled eDP device node

ARM64: dts: rk3399: evb1-cros: disabled eDP device node

There is a pull up resistor connected to eDP HPD pin on EVB1
hardware, and then eDP controller would always reported that
eDP panel is connected, even if no panel connected.

That would cause driver keep failed on eDP AUX communication,
and lots of annoying error messages would be printed out.

Beside actually the primary panel on EVB1 board is MIPI panel,
few people would have the eDP panel. So let's just disabled
the eDP device on EVB1 board.

Change-Id: Ic2f8b94360821f91e3607c2bfde7d8399fd0080f
Signed-off-by: Yakir Yang <ykk@rock-chips.com>