Add TF_LITE_MICRO

Tensorflow is migrating its flag settings from from
TF_LITE_STATIC_MEMORY to TF_LITE_MICRO.

Change-Id: Iccc1ceef22b7db50fcc89e604a2839f32ccd7613
diff --git a/tensorflow.cmake b/tensorflow.cmake
index 80f41f1..2ec9fa7 100644
--- a/tensorflow.cmake
+++ b/tensorflow.cmake
@@ -72,7 +72,7 @@
 set_property(TARGET tflu PROPERTY IMPORTED_LOCATION ${TFLU_GENDIR}/lib/libtensorflow-microlite.a)
 add_dependencies(tflu tflu_gen)
 target_include_directories(tflu INTERFACE ${TENSORFLOW_PATH})
-target_compile_definitions(tflu INTERFACE TF_LITE_STATIC_MEMORY)
+target_compile_definitions(tflu INTERFACE TF_LITE_MICRO TF_LITE_STATIC_MEMORY)
 
 if(CORE_SOFTWARE_ACCELERATOR STREQUAL NPU)
     target_link_libraries(tflu INTERFACE ethosu_core_driver)