wifi: mt76: add mt76_connac_mcu_build_rnr_scan_param routine

Introduce mt76_connac_mcu_build_rnr_scan_param routine for handling
RNR scan. This is a preliminary patch to enable RNR scan in mt7921 and
mt7925 driver.

Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250321013829.3598-1-mingyen.hsieh@mediatek.com


Signed-off-by: Felix Fietkau <nbd@nbd.name>