wifi: mt76: mt76_connac3: move lmac queue enumeration in mt76_connac3_mac.h

This is a preliminary patch to introduce mt7925 chip 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>