dt-bindings: add firefly-rk3399 board support

Use "firefly,firefly-rk3399" compatible string for firefly-rk3399 board.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
1 file changed