add empty impls for urCommandBufferAppendUSMPrefetchExp and urCommandBufferAppendUSMAdviseExp

Author: PietroGhg

source/adapters/native_cpu/command_buffer.cpp

@@ -147,3 +147,18 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMFillExp(
     ur_exp_command_buffer_sync_point_t *) {
   return UR_RESULT_ERROR_UNSUPPORTED_FEATURE;
 }
+
+UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMPrefetchExp(
+    ur_exp_command_buffer_handle_t, const void *, size_t,
+    ur_usm_migration_flags_t, uint32_t,
+    const ur_exp_command_buffer_sync_point_t *,
+    ur_exp_command_buffer_sync_point_t *) {
+  return UR_RESULT_ERROR_UNSUPPORTED_FEATURE;
+}
+
+UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMAdviseExp(
+    ur_exp_command_buffer_handle_t, const void *, size_t, ur_usm_advice_flags_t,
+    uint32_t, const ur_exp_command_buffer_sync_point_t *,
+    ur_exp_command_buffer_sync_point_t *) {
+  return UR_RESULT_ERROR_UNSUPPORTED_FEATURE;
+}