mt76: do not store aggregation sequence number for null-data frames

[ Upstream commit 5155938d8a0fe0e0251435cae02539e81fb8e407 ]

Fixes a rare corner case where a BlockAckReq might get the wrong
sequence number.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
1 file changed