dts: versatile: add missing irq controller properties

Add valid-mask and clear-mask properties to the versatile dts so the
platform code doing the same thing can be removed.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/versatile-ab.dts

@@ -59,6 +59,8 @@ vic: intc@10140000 {
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			reg = <0x10140000 0x1000>;
+			clear-mask = <0xffffffff>;
+			valid-mask = <0xffffffff>;
 		};
 
 		sic: intc@10003000 {
@@ -68,6 +70,8 @@ sic: intc@10003000 {
 			reg = <0x10003000 0x1000>;
 			interrupt-parent = <&vic>;
 			interrupts = <31>; /* Cascaded to vic */
+			clear-mask = <0xffffffff>;
+			valid-mask = <0xffc203f8>;
 		};
 
 		dma@10130000 {