Calculate the offset of center and primary frequencies to get hardware
indices of center channel and primary channel, and then use them to
configure hardware to a specific channel.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220222032103.29392-1-pkshih@realtek.com