test(realm): add test for RSI_PLANE_REG_READ/WRITE command

test for RSI_PLANE_REG_READ/WRITE command

Signed-off-by: Shruti Gupta <shruti.gupta@arm.com>
Change-Id: I92e0aeef48c9b2abe26e5d3b2ea62669a22d4f8b
diff --git a/realm/include/realm_helpers.h b/realm/include/realm_helpers.h
index 9214564..7ed8f9b 100644
--- a/realm/include/realm_helpers.h
+++ b/realm/include/realm_helpers.h
@@ -34,6 +34,8 @@
 
 /* Function for initializing planes, called at Boot */
 void realm_plane_init(void);
+bool plane_common_init(u_register_t plane_index, u_register_t perm_index,
+		u_register_t base, rsi_plane_run *run);
 
 #endif /* REALM_HELPERS_H */