feat(tc): add device tree binding for SPE

Add node for Statistical Profiling Extension, which provides
periodic sampling of operations in the CPU pipeline and reports
this via the perf AUX interface.

Change-Id: Ic7a9d9ce927edbce02c7c09470a009dc56247240
Signed-off-by: Jagdish Gediya <jagdish.gediya@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/fdts/tc2.dts b/fdts/tc2.dts
index 8aa8b9e..d90d9cf 100644
--- a/fdts/tc2.dts
+++ b/fdts/tc2.dts
@@ -263,6 +263,10 @@
 		};
 	};
 
+	spe-pmu-big {
+		status = "okay";
+	};
+
 	smmu_700: iommu@3f000000 {
 		status = "okay";
 	};