ARM: dts: at91: sama5d2: use sama5d2 compatible string for SMC

A new compatible string has been introduced for sama5d2 SMC to allow to
manage the registers mapping change.
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

arch/arm/boot/dts/sama5d2.dtsi

@@ -1048,7 +1048,7 @@ tcb1: timer@f8010000 {
 			};
 
 			hsmc: hsmc@f8014000 {
-				compatible = "atmel,sama5d3-smc", "syscon", "simple-mfd";
+				compatible = "atmel,sama5d2-smc", "syscon", "simple-mfd";
 				reg = <0xf8014000 0x1000>;
 				interrupts = <5 IRQ_TYPE_LEVEL_HIGH 6>;
 				clocks = <&hsmc_clk>;