wifi: rtw89: phy: rate pattern handles HW rate by chip gen

Rate pattern is controlled by 'iw bitrates' to fix rate as desired, and
we extend to support v1 rate.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230728070252.66525-4-pkshih@realtek.com