genetlink: Add genlmsg_parse() helper function.
genetlink: Add genlmsg_parse() helper function.

The first user will be the next patch.

Signed-off-by: Joe Stringer <59969d4426ca8e68344c28a9fcbac155693c4b00@nicira.com>
Acked-by: Pravin B Shelar <95dcc1879f3489c0d5163907cdd946775296b2dd@nicira.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs