feat(tzc400): update filters by region

Add a new function that allows to enable or disabled filters on
configured regions dynamically. This will avoid the need to
reconfigure the entire attribute and just manage to
enable/disable filters.

Change-Id: If0937ca755bec6c45d3649718147108459682fff
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
diff --git a/include/drivers/arm/tzc400.h b/include/drivers/arm/tzc400.h
index 5f8a48f..765c130 100644
--- a/include/drivers/arm/tzc400.h
+++ b/include/drivers/arm/tzc400.h
@@ -109,6 +109,7 @@
 			  unsigned long long region_top,
 			  unsigned int sec_attr,
 			  unsigned int nsaid_permissions);
+void tzc400_update_filters(unsigned int region, unsigned int filters);
 void tzc400_set_action(unsigned int action);
 void tzc400_enable_filters(void);
 void tzc400_disable_filters(void);