mt76: mt76x02: fix beacon timer drift adjustment

Check the count before incrementing it to match vendor code behavior.
This defers the adjustment by one more tick, which should improve accuracy

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2019-02-24 11:24:43 +01:00
commit b3f09304ba