ARM: dts: da850-evm: Enable tca6416 on baseboard

There is a GPIO expander on both the UI board as well as the
baseboard.  This patch enables the second tca6416 and identifies
it as being on the baseboard using _bb as the suffix.
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/boot/dts/da850-evm.dts

@@ -221,6 +221,12 @@ tca6416: gpio@20 {
 		gpio-controller;
 		#gpio-cells = <2>;
 	};
+	tca6416_bb: gpio@21 {
+		compatible = "ti,tca6416";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
 };
 
 &wdt {