dt-bindings: sort Rockchip vop compatible by chip's number

Reorder the compatible vop devices to be sorted by chip number
in ascending order.
Reviewed-by: NTomasz Figa <tfiga@chromium.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>
[seanpaul added commit description per tfiga's review]
Signed-off-by: NSean Paul <seanpaul@chromium.org>

Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt

@@ -6,8 +6,8 @@ buffer to an external LCD interface.
 
 Required properties:
 - compatible: value should be one of the following
-		"rockchip,rk3288-vop";
 		"rockchip,rk3036-vop";
+		"rockchip,rk3288-vop";
 
 - interrupts: should contain a list of all VOP IP block interrupts in the
 		 order: VSYNC, LCD_SYSTEM. The interrupt specifier