wifi: mt76: mt7921: convert acpisar and clc pointers to void

Convert acpisar and clc pointers in mt7921_dev structure to void.
This is a preliminary patch to add WiFi7 chipset support

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>