RDMA/netlink: Resort policy array

Sort the netlink policy array by netlink attribute name.  This will make
it easier in the future to find the entry you are looking for when you
need to make changes, or to make sure you don't add the same entry
twice.

Fix the whitespace while we are there.

Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>