[Telink] try to use new variable for path

examples/chef/chef.py

@@ -89,7 +89,9 @@ def load_config() -> None:
         config["ameba"]["MATTER_SDK"] = None
         config["ameba"]["MODEL"] = 'D'
         config["ameba"]["TTY"] = None
-        config["telink"]["ZEPHYR_BASE"] = os.environ.get('ZEPHYR_BASE')
+        config["telink"]["ZEPHYR_BASE"] = os.environ.get('TELINK_ZEPHYR_BASE')
+        config["telink"]["ZEPHYR_SDK_INSTALL_DIR"] = os.environ.get(
+            'TELINK_ZEPHYR_SDK_DIR')
         config["telink"]["TTY"] = None
 
         flush_print(yaml.dump(config))
@@ -542,7 +544,13 @@ def main() -> int:
             flush_print(
                 'Path for Telink SDK was not found. Make sure Telink_SDK is set on your config.yaml file')
             exit(1)
+        if config['telink']['ZEPHYR_SDK_INSTALL_DIR'] is None:
+            flush_print(
+                'Path for Telink toolchain was not found. Make sure Telink toolchain is set on your config.yaml file')
+            exit(1)
         shell.run_cmd("export ZEPHYR_TOOLCHAIN_VARIANT=zephyr")
+        shell.run_cmd(
+            f"export ZEPHYR_SDK_INSTALL_DIR={config['telink']['ZEPHYR_SDK_INSTALL_DIR']}")
         shell.run_cmd(
             f"export ZEPHYR_BASE={config['telink']['ZEPHYR_BASE']}")
         shell.run_cmd(