wifi: mt76: mt7925: ensure all MCU commands wait for response

wifi: mt76: mt7925: ensure all MCU commands wait for response

Modify MCU command sending functions to wait for a response,
ensuring consistent behavior across all commands and improves
reliability by confirming that each command is processed
successfully.

Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Michael Lo <michael.lo@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250414013954.1151774-3-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>