doc: security/etsi: Provision 6.1.2 assessment

Add self-assessment for provision 6.1.2

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
diff --git a/doc/security/standards/etsi-303645.rst b/doc/security/standards/etsi-303645.rst
index 62e4caa..aac342f 100644
--- a/doc/security/standards/etsi-303645.rst
+++ b/doc/security/standards/etsi-303645.rst
@@ -701,7 +701,7 @@
       - Where personal data is processed on the basis of consumers' consent, this consent
         shall be obtained in a valid way.
       - M C
-      -
+      - N/A
       -
 
         .. _ETSI_Provision_6_1_3: