IVGCVSW-4699 Force timestamps to always be in nanoseconds

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: Id0fef58ff06caae258d9a77132a7ab1ae0c23060
diff --git a/src/profiling/ProfilingUtils.cpp b/src/profiling/ProfilingUtils.cpp
index e542b69..fc70856 100644
--- a/src/profiling/ProfilingUtils.cpp
+++ b/src/profiling/ProfilingUtils.cpp
@@ -1047,9 +1047,9 @@
 #endif
 
     // Take a timestamp
-    auto timestamp = clock::now();
+    auto timestamp = std::chrono::duration_cast<std::chrono::nanoseconds>(clock::now().time_since_epoch());
 
-    return static_cast<uint64_t>(timestamp.time_since_epoch().count());
+    return static_cast<uint64_t>(timestamp.count());
 }
 
 } // namespace profiling