The 8390 driver had been fixed for leaking information in short packets
prior to skb_padto() existing.  This change gets rid of the scratch area on
the stack and makes it use skb_padto().  Thanks to Mark Smith for bringing
this to my attention.
Signed-off-by: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>