ARM: dts: rockchip: rk312x-android remove ion node

Change-Id: I08feb4bc74482e7dec885ab74898e3a238c834ff
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>

Author: jayxurockchip

arch/arm/boot/dts/rk312x-android.dtsi

@@ -139,19 +139,6 @@
 		};
 	};
 
-	ion {
-		compatible = "rockchip,ion";
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		memory-region = <&cma_region>;
-
-		cma-heap {
-		};
-		system-heap {
-		};
-	};
-
 	ramoops {
 		compatible = "ramoops";
 		record-size = <0x0 0x20000>;