tools/mpremote: Fix possibly-missing EOPNOTSUPP errno name.

Signed-off-by: Anson Mansfield <amansfield@mantaro.com>

Author: AJMansfield

tools/mpremote/mpremote/transport.py

@@ -56,7 +56,10 @@ def __init__(self, status_code, error_output):
 # raises it as the corresponding OSError-derived exception.
 def _convert_filesystem_error(e, info):
     if "OSError" in e.error_output:
-        for code, estr in errno.errorcode.items():
+        for code, estr in [
+            *errno.errorcode.items(),
+            (errno.EOPNOTSUPP, "EOPNOTSUPP"),
+        ]:
             if estr in e.error_output:
                 return OSError(code, info)
     return e