ARM: dts: bcm281xx: use existing defines for irqs

Use the standard interrupt-controller and ARM GIC constants to
improve the readability of bcm281xx DT irq properties.
Signed-off-by: Matt Porter <matt.porter@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Christian Daudt <csd@broadcom.com>

arch/arm/boot/dts/bcm11351.dtsi

@@ -11,6 +11,9 @@
  * GNU General Public License for more details.
  */
 
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
 #include "skeleton.dtsi"
 
 / {
@@ -41,7 +44,7 @@ uart@3e000000 {
 		status = "disabled";
 		reg = <0x3e000000 0x1000>;
 		clock-frequency = <13000000>;
-		interrupts = <0x0 67 0x4>;
+		interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
 	};
@@ -56,7 +59,7 @@ L2: l2-cache {
 	timer@35006000 {
 		compatible = "bcm,kona-timer";
 		reg = <0x35006000 0x1000>;
-		interrupts = <0x0 7 0x4>;
+		interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
 		clock-frequency = <32768>;
 	};