wifi: rtw89: 8922a: support different SAR configs by antenna

Set SAR configs to the corresponding CRs (control registers) according to
RF path. Then, declare to support SAR by antenna in chip info.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250326020643.14487-11-pkshih@realtek.com