arm64: dts: Add dts files to enable ION on Hi6220 SoC.

Add ION node to enable ION on hi6220 SoC platform
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NYu Dongbin <yudongbin@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts

@@ -11,6 +11,7 @@
 /memreserve/ 0x05e00000 0x00100000;
 
 #include "hi6220.dtsi"
+#include "hi6220-ion.dtsi"
 
 / {
 	model = "HiKey Development Board";

arch/arm64/boot/dts/hisilicon/hi6220-ion.dtsi

+/ {
+	hi6220-ion {
+		compatible = "hisilicon,hi6220-ion";
+		heap_sys_user@0 {
+			heap-name = "sys_user";
+			heap-id   = <0x0>;
+			heap-base = <0x0>;
+			heap-size = <0x0>;
+			heap-type = "ion_system";
+		};
+		heap_sys_contig@0 {
+			heap-name = "sys_contig";
+			heap-id   = <0x1>;
+			heap-base = <0x0>;
+			heap-size = <0x0>;
+			heap-type = "ion_system_contig";
+		};
+	};
+
+};