build_helper_configs.py: Add 2 psa-arch-test config for PP test

Temporarily add them for verifying the split build changes.

Change-Id: Ib3b164cad429c992157bb33f4626d80076afa207
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
diff --git a/build_helper/build_helper_configs.py b/build_helper/build_helper_configs.py
index 021c34f..feee704 100755
--- a/build_helper/build_helper_configs.py
+++ b/build_helper/build_helper_configs.py
@@ -301,6 +301,12 @@
                     # psoc64_GCC_2_RegS_RegNS_Release
                     # ("cypress/psoc64", "GCC_10_3", "2",
                     #  "RegS, RegNS", "OFF", "Release", False, "", ""),
+                    # an521_GCC_1_FF_Release
+                    ("arm/mps2/an521", "GCC_10_3", "1",
+                     "OFF", "IPC", "Release", True, "", ""),
+                     # an521_GCC_2_STORAGE_Debug
+                    ("arm/mps2/an521", "ARMCLANG_6_18", "2",
+                     "OFF", "STORAGE", "Debug", True, "", ""),
                 ],
                 "invalid": _common_tfm_invalid_configs + []
                 }