wifi: rtw89: 8851b: rfk: update IQK TIA setting

With the new TIA setting of RX IQK, unstable RX throughput can
be avoided, especially in medium-high attenuation environments.

Signed-off-by: Kuan-Chung Chen <damon.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250811123744.15361-5-pkshih@realtek.com