wifi: rtw89: pass rtwvif to RFK channel

For chips supporting multiple channels, they need to get target info
from rtwvif, e.g. PHY index and Chanctx index.

So, change rfk_channel prototype and pass rtwvif ahead.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240727080650.12195-5-pkshih@realtek.com