ARM: dts: at91: sama5d2: Add secumod node

The sama5d2 has a security module, add its node.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

arch/arm/boot/dts/sama5d2.dtsi

@@ -1244,6 +1244,11 @@ pioA: pinctrl@fc038000 {
 				clocks = <&pioA_clk>;
 			};
 
+			secumod@fc040000 {
+				compatible = "atmel,sama5d2-secumod", "syscon";
+				reg = <0xfc040000 0x100>;
+			};
+
 			tdes@fc044000 {
 				compatible = "atmel,at91sam9g46-tdes";
 				reg = <0xfc044000 0x100>;