ARM: at91/dt: sama5d4: fix lcdck clock definition

lcdck takes mck (not smd) as its parent. It is also assigned id 3 and not 4.
Signed-off-by: NBoris BREZILLON <boris.brezillon@free-electrons.com>
[nicolas.ferre@atmel.com: squashed 2 related patches]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/sama5d4.dtsi

@@ -462,8 +462,8 @@
 
 					lcdck: lcdck {
 						#clock-cells = <0>;
-						reg = <4>;
-						clocks = <&smd>;
+						reg = <3>;
+						clocks = <&mck>;
 					};
 
 					smdck: smdck {