test(psci): add tests for OS-initiated mode

Change-Id: I33e135f659aea600f71e053ac3db57eb0172e22b
Signed-off-by: Wing Li <wingers@google.com>
diff --git a/include/plat/common/plat_topology.h b/include/plat/common/plat_topology.h
index 0ca5eff..fbae878 100644
--- a/include/plat/common/plat_topology.h
+++ b/include/plat/common/plat_topology.h
@@ -86,6 +86,8 @@
 	unsigned char is_present;
 } tftf_pwr_domain_node_t;
 
+extern tftf_pwr_domain_node_t tftf_pd_nodes[PLATFORM_NUM_AFFS];
+
 /*
  * Detect and store the platform topology so that test cases can query it later.
  */