This converts ib_srp to use the srp transport class.

I don't have ib hardware so I've not tested this patch.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>