ARM: dts: at91: at91sam9n12: switch to new clock bindings

Switch at91sam9n12 boards to the new PMC clock bindings.

Link: https://lore.kernel.org/r/20200116173510.427403-1-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

arch/arm/boot/dts/at91sam9n12ek.dts

@@ -59,7 +59,7 @@ i2c0: i2c@f8010000 {
 				wm8904: codec@1a {
 					compatible = "wlf,wm8904";
 					reg = <0x1a>;
-					clocks = <&pck0>;
+					clocks = <&pmc PMC_TYPE_SYSTEM 8>;
 					clock-names = "mclk";
 				};