wifi: rtw88: Add support for the SDIO based RTL8821CS chipset

Wire up RTL8821CS chipset support using the new rtw88 SDIO HCI code as
well as the existing RTL8821C chipset code.

Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Tested-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230405200729.632435-10-martin.blumenstingl@googlemail.com