tf-coverity: exclude RSS platform service code

This code is not used yet. When we add support for non-volatile
counters in the CCA chain of trust, this patch can be reverted.

Change-Id: I10cba3372a1a788cddb9d172d34803a1c3aeeb61
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/script/tf-coverity/coverity_tf_conf.py b/script/tf-coverity/coverity_tf_conf.py
index df92c32..15a2296 100644
--- a/script/tf-coverity/coverity_tf_conf.py
+++ b/script/tf-coverity/coverity_tf_conf.py
@@ -119,4 +119,6 @@
 
     # Exclude the following files used for TC host tools (fiptool)
     ("plat/arm/board/tc/plat_def_uuid_config.c", "Used to build TC fiptool"),
+
+    ("lib/psa/rss_platform.c", "Not used yet."),
 ]