wifi: rtw89: correct enable functions of HCI/PCI DMA

Some PCI and MAC registers are changed for different
chips and correct them accordingly. And HCI MAD functions
belongs to MAC core, so move it to mac.h/.c.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220912071706.13619-3-pkshih@realtek.com