ARM: dts: sam9x60: use CCF compatibles for PMC

Use CCF compatible for PMC. With this, the board/SoC will be
able to boot.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
index 44af5d9..96914b3 100644
--- a/arch/arm/dts/sam9x60ek.dts
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -67,7 +67,7 @@
 					pinctrl-0 = <&pinctrl_flx0>;
 					#address-cells = <1>;
 					#size-cells = <0>;
-					clocks = <&flx0_clk>;
+					clocks = <&pmc PMC_TYPE_PERIPHERAL 5>;
 					status = "okay";
 
 					eeprom@53 {