ARM: at91/dt: sama5d4: add pioD controller

PioD controller was not described in the device tree since we don't use
it. As pinctrl-at91 allows disabled gpio controllers in the device
tree, we can add it to complete the device description.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/sama5d4.dtsi

@@ -62,6 +62,7 @@ aliases {
 		gpio0 = &pioA;
 		gpio1 = &pioB;
 		gpio2 = &pioC;
+		gpio3 = &pioD;
 		gpio4 = &pioE;
 		tcb0 = &tcb0;
 		tcb1 = &tcb1;
@@ -1121,6 +1122,18 @@ pioC: gpio@fc06c000 {
 					clocks = <&pioC_clk>;
 				};
 
+				pioD: gpio@fc068000 {
+					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
+					reg = <0xfc068000 0x100>;
+					interrupts = <5 IRQ_TYPE_LEVEL_HIGH 1>;
+					#gpio-cells = <2>;
+					gpio-controller;
+					interrupt-controller;
+					#interrupt-cells = <2>;
+					clocks = <&pioD_clk>;
+					status = "disabled";
+				};
+
 				pioE: gpio@fc06d000 {
 					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
 					reg = <0xfc06d000 0x100>;