ARM: dts: at91: use sama5d2 programmable clock binding

Use the proper sama5d2 compatibility string for programmable clock. This would
use the fixed prescaler formula of this driver.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[nicolas.ferre@microchip.com: split the patch]
Signed-off-by: Matthias Wieloch <matthias.wieloch@few-bauer.de>

Author: Matthias Wieloch

arch/arm/boot/dts/sama5d2.dtsi

@@ -554,7 +554,7 @@
 				};
 
 				prog: progck {
-					compatible = "atmel,at91sam9x5-clk-programmable";
+					compatible = "atmel,sama5d2-clk-programmable";
 					#address-cells = <1>;
 					#size-cells = <0>;
 					interrupt-parent = <&pmc>;