wifi: rtw89: pci: implement PCI mac_post_init for WiFi 7 chips

For normal use, we do additional settings than mac_pre_init, such as
more TX/RX DMA channels, interrupt mitigation and etc.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231101072149.21997-6-pkshih@realtek.com