ARM: dts: imx6sx-sabreauto: add max7322 IO expander support

Add MAX7322 IO expander support.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Reviewed-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx-sabreauto.dts

@@ -254,4 +254,11 @@
 			};
 		};
 	};
+
+	max7322: gpio@68 {
+		compatible = "maxim,max7322";
+		reg = <0x68>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
 };