RDMA/irdma: Set protocol based on PF rdma_mode flag

Set the RDMA protocol to use at driver bind time based on the ice PF's
rdma_mode flag.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Tested-by: Leszek Kaliszczuk <leszek.kaliszczuk@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>