Change add_compile_definitions to target_compile_definitions, following change...

Change add_compile_definitions to target_compile_definitions, following change in CMakeLists.txt loading order change, to properly apply needed preprocessor definitions to `nr-softmodem` target

nfapi/oai_integration/aerial/CMakeLists.txt

@@ -24,10 +24,8 @@ if (OAI_AERIAL)
         message(STATUS "  nvlog library found in ${NVLOG_LIB}")
     endif ()
 
-    add_compile_definitions(ENABLE_L2_SLT_RSP)
-    add_compile_definitions(FAPI_BYTE_ORDERING_BIG_ENDIAN)
-    add_compile_definitions(ENABLE_AERIAL)
+    target_compile_definitions(nr-softmodem PRIVATE ENABLE_L2_SLT_RSP FAPI_BYTE_ORDERING_BIG_ENDIAN ENABLE_AERIAL)
     target_link_libraries(nr-softmodem PRIVATE  "${NVLOG_LIB}" "${NVIPC_LIB}")
 else()
     message(STATUS "No Support for Aerial")
-endif()
\ No newline at end of file
+endif()