Redefine rws bit field type

[Taichi Ishitani]

The set signal of rws bit field type acts as a hw write port and this behavior is not matched with other xxs bit field types.
Therefore, bit field value of rws should also be set to 1 like other xxs bit field types.

To do this change, the bit field types below should be renamed.
(hw means hardware write.)

• rws -> rwhw
• rol -> rohw