net: tracepoint: exposing sk_faimily in tracepoint inet_sock_set_state

As of now, there're two sk_family are traced with sock:inet_sock_set_state,
which are AF_INET and AF_INET6.
So the sk_family are exposed as well.
Then we can conveniently use it to do the filter.

Both sk_family and sk_protocol are showed in the printk message, so we need
not expose them as tracepoint arguments.

Suggested-by: Brendan Gregg <[email protected]>
Suggested-by: Song Liu <[email protected]>
Signed-off-by: Yafang Shao <[email protected]>
Reviewed-by: Song Liu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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