arm64: dts: hikey: enable i2c0 and i2c1 for working with mezzanine boards

In HiKey board dts file, enable i2c0 and i2c1 for working with 96boards' LS
mezzanine.
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

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

@@ -45,6 +45,14 @@ soc {
 		spi0: spi@f7106000 {
 			status = "ok";
 		};
+
+		i2c0: i2c@f7100000 {
+			status = "ok";
+		};
+
+		i2c1: i2c@f7101000 {
+			status = "ok";
+		};
 	};
 };