via-velocity: Call dev_kfree_skb_any instead of kfree_skb.

Replace dev_kfree_skb with dev_kfree_skb_any in velocity_xmit that can
be called in hard irq and other contexts.  Packets are freed and
dropped in velocity_xmit when they are too fragmented and can
not be linearized.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>