mt76: fix crash on tearing down ext phy

Only clear dev->phy2 after the phy is gone, the driver may still need to access
it until shutdown is complete

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2021-01-19 13:19:53 +01:00
commit 94b6df08da