intel/genxml: Fix gen_sort_tags.py to handle mbz/mbo

mbz and mbo are base types and not a structure to find as a dependency.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23684>

src/intel/genxml/gen_sort_tags.py

@@ -39,6 +39,8 @@ BASE_TYPES = {
     'uint',
     'bool',
     'float',
+    'mbz',
+    'mbo',
 }
 
 FIXED_PATTERN = re.compile(r"(s|u)(\d+)\.(\d+)")