install ULP toolchain via tl-install

Author: Jason2866

platform.py

@@ -135,7 +135,7 @@ def install_tool(TOOL):
                 ulp_toolchain = toolchain_data.get("ulp_toolchain")
                 if ulp_toolchain and os.path.isdir("ulp"):
                     for toolchain in ulp_toolchain:
-                        self.packages[toolchain]["optional"] = False
+                        install_tool(toolchain)
                 # Install debug tools if conditions match
                 if (variables.get("build_type") or "debug" in "".join(targets)) or variables.get("upload_protocol"):
                     for debug_tool in toolchain_data["debug_tools"]: