Add macro for targets that have timing adapters

Change-Id: I22a32d40e97cfeb41d8002cb7e477668fa58f501
Signed-off-by: Jonny Svärd <jonny.svaerd@arm.com>
diff --git a/targets/corstone-300/CMakeLists.txt b/targets/corstone-300/CMakeLists.txt
index 9f8ed36..bc91603 100644
--- a/targets/corstone-300/CMakeLists.txt
+++ b/targets/corstone-300/CMakeLists.txt
@@ -78,6 +78,8 @@
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../common target)
 
 target_compile_definitions(ethosu_target_common INTERFACE
+    ETHOSU_HAS_TA
+
     # Configure PMU events
     ETHOSU_PMU_EVENT_0=${ETHOSU_PMU_EVENT_0}
     ETHOSU_PMU_EVENT_1=${ETHOSU_PMU_EVENT_1}