linux-phytec-fsl

skbuff: skb_segment: s/skb_frag/frag/

skb_frag can in fact point at either skb
or fskb so rename it generally "frag".

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>