wifi: mt76: report non-binding skb tx rate when WED is active

AQL relies on accurate tx rate reporting, so add this patch for
non-binding skb rate when WED is enabled.

Co-developed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>