linux-imx

net: add an identifier name for 'struct sock *'

Fix a warning from checkpatch:
function definition argument 'struct sock *' should also have an
identifier name in include/net/af_unix.h.

Signed-off-by: Bo YU <tsu.yubo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>