wifi: mt76: mt7996: rework ampdu params setting

Add sta_rec_ht_uni struct to pass HT ampdu params to firmware. For VHT,
HE, and EHT mode, firmware will get the ampdu params by parsing the
corresponding capability.

Co-developed-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>