virtio-net: correctly enable multiqueue

virtio-net: correctly enable multiqueue

Commit 4490001029012539937ff02778fe6180613fa949 ("virtio-net: enable
multiqueue by default") blindly set the affinity instead of queues
during probe which can cause a mismatch of #queues between guest and
host. This patch fixes it by setting queues.

Reported-by: Theodore Ts'o <[email protected]>
Tested-by: Theodore Ts'o <[email protected]>
Cc: Neil Horman <[email protected]>
Cc: Michael S. Tsirkin <[email protected]>
Fixes: 49000102901 ("virtio-net: enable multiqueue by default")
Signed-off-by: Jason Wang <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>