Build: Port RSS to split build

Signed-off-by: Jamie Fox <jamie.fox@arm.com>
Change-Id: I94305dccbb9c61555fe4de69f91aec7172b8c1db
diff --git a/cmake/install.cmake b/cmake/install.cmake
index 8066af6..49f293b 100644
--- a/cmake/install.cmake
+++ b/cmake/install.cmake
@@ -57,6 +57,7 @@
 
 if (TFM_PARTITION_PROTECTED_STORAGE)
     install(FILES       ${INTERFACE_INC_DIR}/psa/protected_storage.h
+                        ${INTERFACE_INC_DIR}/psa/storage_common.h
             DESTINATION ${INSTALL_INTERFACE_INC_DIR}/psa)
     install(FILES       ${INTERFACE_INC_DIR}/tfm_ps_defs.h
             DESTINATION ${INSTALL_INTERFACE_INC_DIR})