ARM: dts: at91: at91sam9260: switch to new clock bindings

Switch at91sam9260 and at91sam9g20 boards to the new PMC clock bindings.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

arch/arm/boot/dts/at91sam9g20.dtsi

@@ -40,28 +40,7 @@ adc0: adc@fffe0000 {
 			};
 
 			pmc: pmc@fffffc00 {
-				plla: pllack {
-					atmel,clk-input-range = <2000000 32000000>;
-					atmel,pll-clk-output-ranges = <745000000 800000000 0 0>,
-								<695000000 750000000 1 0>,
-								<645000000 700000000 2 0>,
-								<595000000 650000000 3 0>,
-								<545000000 600000000 0 1>,
-								<495000000 550000000 1 1>,
-								<445000000 500000000 2 1>,
-								<400000000 450000000 3 1>;
-				};
-
-				pllb: pllbck {
-					compatible = "atmel,at91sam9g20-clk-pllb";
-					atmel,clk-input-range = <2000000 32000000>;
-					atmel,pll-clk-output-ranges = <30000000 100000000 0 0>;
-				};
-
-				mck: masterck {
-					atmel,clk-output-range = <0 133000000>;
-					atmel,clk-divisors = <1 2 4 6>;
-				};
+				compatible = "atmel,at91sam9g20-pmc", "atmel,at91sam9260-pmc", "syscon";
 			};
 		};
 	};