RDMA/ocrdma: Prevent allocation of DPP PDs if FW doesnt support it

If DPP PDs are not supported by the FW, allocate only normal PDs.

Signed-off-by: Mitesh Ahuja <mitesh.ahuja@avagotech.com>
Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@avagotech.com>
Signed-off-by: Selvin Xavier <selvin.xavier@avagotech.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>