rtw89: 8852c: add help function of set channel

During setting channel, we need to backup/restore and disable/enable some
settings. The settings include SCH (scheduler channel), PPDU status report,
and RF components, DFS and ADC.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220414062027.62638-13-pkshih@realtek.com