feat(tc): update DT for Drage GPU

This patch incorporates the changes for Drage GPU to uses new access
window interface "IRQ_AW". As the interrupt properties are different
between TC4 and other TC platforms, this patch appends the interrupt
properties in platform specific DT binding file.

Change-Id: I2ca505846f03ce64b8e5f02fd202962dbfe39f25
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/fdts/tc3.dts b/fdts/tc3.dts
index 51431c2..ffe3b6d 100644
--- a/fdts/tc3.dts
+++ b/fdts/tc3.dts
@@ -110,6 +110,10 @@
 	};
 
 	gpu: gpu@2d000000 {
+		interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH 0>,
+			     <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH 0>,
+			     <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH 0>;
+		interrupt-names = "JOB", "MMU", "GPU";
 #if TARGET_FLAVOUR_FVP
 		iommus = <&smmu_700 0x200>;
 #endif