arm64: dts: renesas: salvator-common: add GPIO extender

We need to configure its GPIOs later.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/salvator-common.dtsi

@@ -338,6 +338,13 @@ cs2000: clk_multiplier@4f {
 &i2c4 {
 	status = "okay";
 
+	pca9654: gpio@20 {
+		compatible = "onnn,pca9654";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
 	csa_vdd: adc@7c {
 		compatible = "maxim,max9611";
 		reg = <0x7c>;