rtw89: extend dmac_pre_init to support 8852C

DMAC is short for data MAC. 8852C has more settings than 8852A, so add
them.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220325060055.58482-9-pkshih@realtek.com