Build: Update map name of RSS

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I279233a0d79767f746055109762eab3c4a1eacea
diff --git a/build_helper/build_helper_config_maps.py b/build_helper/build_helper_config_maps.py
index c4724b7..810cabe 100644
--- a/build_helper/build_helper_config_maps.py
+++ b/build_helper/build_helper_config_maps.py
@@ -23,7 +23,7 @@
     "arm/musca_s1"                       : "MUSCA_S1",
     "arm/corstone1000"                   : "corstone1000",
     "arm/mps3/corstone310_fvp"           : "corstone310",
-    "arm/rss"                            : "RSS",
+    "arm/rss/tc"                         : "RSS",
     "cypress/psoc64"                     : "psoc64",
     "lairdconnectivity/bl5340_dvk_cpuapp": "BL5340",
     "nordic_nrf/nrf5340dk_nrf5340_cpuapp": "nrf5340dk",