Build: Move PSOFF param from common to extra params

PS partition is enabled by default in most config groups.
Move it to extra params to simplify build config params.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I742eb7b0b6384b951eaa87aedec0b80d8487c62a
diff --git a/build_helper/build_helper_config_maps.py b/build_helper/build_helper_config_maps.py
index 69427aa..c4724b7 100644
--- a/build_helper/build_helper_config_maps.py
+++ b/build_helper/build_helper_config_maps.py
@@ -65,6 +65,8 @@
     "FPON"         : ("-DCONFIG_TFM_ENABLE_FP=ON "
                       "-DTEST_S_FPU=ON -DTEST_NS_FPU=ON "),
     "LZOFF"        : "-DCONFIG_TFM_LAZY_STACKING=OFF ",
+    # Partiton
+    "PSOFF"        : "-DTFM_PARTITION_PROTECTED_STORAGE=OFF ",
     # SFN
     "SFN"          : "-DCONFIG_TFM_SPM_BACKEND=SFN ",
     # CC Driver