nouveau/parser: Parse all fields in each method

When converting to mako, the break got moved to the wrong spot and we
were only parsing the first method.  Now we parse them all.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>

src/nouveau/nvidia-headers/class_parser.py

@@ -203,8 +203,8 @@ P_DUMP_${nvcl}_MTHD_DATA(FILE *fp, uint16_t idx, uint32_t data,
         fprintf(fp, "(0x%x)${bs}n", parsed);
       %endif
     %endif
-        break;
   %endfor
+        break;
 %endfor
     default:
         fprintf(fp, "%s.VALUE = 0x%x${bs}n", prefix, data);