rtw89: 8852c: add HFC parameters

HFC is short for HCI flow control, and these parameters is used to
configure PCI quota for TX/RX.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220414062027.62638-9-pkshih@realtek.com