Add P200 support

Author: kyliechen-cisco

fboss/lib/platform_mapping_v2/read_files_utils.py

@@ -517,7 +517,7 @@ def read_si_settings(  # noqa: C901
         )
 
         tx_kwargs: Dict[str, Any] = {}
-        if chip.core_type == CoreType.G200:
+        if chip.core_type in (CoreType.G200, CoreType.P200):
             # pyrefly: ignore [missing-attribute]
             if "TX_PRE3" in column_names and row[Column.TX_PRE3]:
                 # pyrefly: ignore [missing-attribute]

fboss/lib/platform_mapping_v2/test/verify_generated_files.py

@@ -57,6 +57,7 @@ class TestVerifyPlatformMappingGeneratedFiles(unittest.TestCase):
             "tahansb800bc_test_fixture",
             "wedge800bact",
             "m4062nhp",
+            "m5120csc",
             "wedge800bnhp",
             "wedge800cact",
             "blackwolf800banw",