ARM i.MX53: dts: add i2c aliases

This allows to order the i2c character devices correctly,
so that /dev/i2c-0 corresponds to i2c1, /dev/i2c-1 corresponds
to i2c2, and so on. Currently they are ordered by register
address.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx53.dtsi

@@ -27,6 +27,9 @@ aliases {
 		gpio4 = &gpio5;
 		gpio5 = &gpio6;
 		gpio6 = &gpio7;
+		i2c0 = &i2c1;
+		i2c1 = &i2c2;
+		i2c2 = &i2c3;
 	};
 
 	tzic: tz-interrupt-controller@0fffc000 {