rtw89: pci: add pci attributes to configure operating mode

Refine operating mode function to support variant chips.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220325060055.58482-3-pkshih@realtek.com