coverity: stop ignoring RSS and MHU driver files

Thanks to the (artificial) PLAT_RSS_NOT_SUPPORTED=0 build condig added
in commit e30bd0c9ac07f "coverity: add coverage for RSS driver", these
files are now getting analysed through Coverity.

Change-Id: If7ae0ea1ffa9cb643bf1d33955a71a5469386555
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 4cb5c98..6774fe9 100644
--- a/script/tf-coverity/coverity_tf_conf.py
+++ b/script/tf-coverity/coverity_tf_conf.py
@@ -41,9 +41,6 @@
     # boot development. There is no publicly available FVP platform to test
     # these source files right now. Some limited testing is available on the AEM
     # FVP, but these mock some of these interfaces.
-    ("drivers/arm/mhu/mhu_v2_x.c", "Not used by any upstream platform"),
-    ("drivers/arm/mhu/mhu_wrapper_v2_x.c", "Not used by any upstream platform"),
-    ("drivers/arm/rss/rss_comms.c", "Not used by any upstream platform"),
     ("lib/psa/delegated_attestation.c", "Not used by any upstream platform"),
 
     # The following block is excluding files that are impossible to include in a build due to a missing file