dt-bindings: add root compatible property for PopMetal board

PopMetal board is a rk3288 based board made by ChipSpark, this
add root compatible property for it

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Andy Yan 2015-03-01 17:28:24 +08:00 • committed by Heiko Stuebner
commit d55ce8d818