mt76: mt7915: fix potential NPE in TXS processing

If skb is null, then don't try to dereference it.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Ben Greear 2021-08-19 13:49:43 -07:00 • committed by Felix Fietkau
commit 16bab11489