wifi: rtw89: load TX power by rate when RFE parms setup

Table of TX power by rate only needs to be loaded once. But, we originally
loaded it every time we start core. Now, we load it one time along as RFE
(RF Front End) parameters are determined.

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/20230920074322.42898-6-pkshih@realtek.com