wifi: rtw88: rtw8822c: Implement RTL8822CS (SDIO) efuse parsing

The efuse of the SDIO RTL8822CS chip has only one known member: the mac
address is at offset 0x16a. Add a struct rtw8822cs_efuse describing this
and use it for copying the mac address when the SDIO bus is used.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230218152944.48842-6-martin.blumenstingl@googlemail.com