Per-patch: Re-enable RSS build

RSS has been ported to align with TF-M split build, so re-enable RSS
build in CI per-patch job.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I5d376aec03bd1b81a5c874833d2ae83bd8dce8e5
diff --git a/build_helper/build_helper_configs.py b/build_helper/build_helper_configs.py
index 1eafdfb..7edcd4c 100755
--- a/build_helper/build_helper_configs.py
+++ b/build_helper/build_helper_configs.py
@@ -299,6 +299,9 @@
                     # MUSCA_S1_GCC_1_RegBL2_RegS_RegNS_Release_BL2_CC_DRIVER_PSA
                     ("arm/musca_s1", "GCC_10_3", "1",
                      "RegBL2, RegS, RegNS", "OFF", "Release", True, "", "CC_DRIVER_PSA"),
+                    # RSS_TC_GCC_2_Release_BL2_PSOFF
+                    ("arm/rss/tc", "GCC_10_3", "2",
+                     "RegS, RegNS", "OFF", "Release", True, "", "PSOFF"),
                     # stm32l562e_dk_ARMCLANG_1_RegS_RegNS_Release_BL2_CRYPTO_OFF
                     ("stm/stm32l562e_dk", "ARMCLANG_6_18", "1",
                      "RegS, RegNS", "OFF", "Release", True, "", "CRYPTO_OFF"),