Rename the qed_roce_if file to qed_rdma_if as it
represents a common interface for RoCE and iWARP.

this commit affects RDMA/qedr as well.
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>