ARM: dts: OMAP4/5: Use existing constants for IRQs

Use the constants defined in include/dt-bindings/interrupt-controller/
to enhance readability.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>
diff --git a/arch/arm/boot/dts/omap4-var-som.dts b/arch/arm/boot/dts/omap4-var-som.dts
index 6593607..b41269e 100644
--- a/arch/arm/boot/dts/omap4-var-som.dts
+++ b/arch/arm/boot/dts/omap4-var-som.dts
@@ -34,7 +34,7 @@
 	twl: twl@48 {
 		reg = <0x48>;
 		/* SPI = 0, IRQ# = 7, 4 = active high level-sensitive */
-		interrupts = <0 7 4>; /* IRQ_SYS_1N cascaded to gic */
+		interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N cascaded to gic */
 		interrupt-parent = <&gic>;
 	};
 };
@@ -68,7 +68,7 @@
 		spi-max-frequency = <24000000>;
 		reg = <0>;
 		interrupt-parent = <&gpio6>;
-		interrupts = <11 8>; /* gpio line 171, low triggered */
+		interrupts = <11 IRQ_TYPE_LEVEL_LOW>; /* gpio line 171 */
 		vdd-supply = <&vdd_eth>;
 	};
 };