Merge branch 'tcp_stream_alloc_skb'

Eric Dumazet says:

====================
tcp: tcp_stream_alloc_skb() changes

sk_stream_alloc_skb() is only used by TCP.

Rename it to tcp_stream_alloc_skb() and apply small
optimizations.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>