tipc: fix missing indentation in source code

Fix misalignment of policy statement in netlink.c due to automatic
spatch code transformation.

Fixes: 3b0f31f2 ("genetlink: make policy common to family")
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: John Rutherford <john.rutherford@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>