qed*: Rename qed_roce_if.h to qed_rdma_if.h

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: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>