IB/hfi1: Convert %Lx to %llx

According to checkpatch %Lx is not standard C so remove it and use the
suggested %llx.

Fixes: 77241056

 ("IB/hfi1: add driver files")
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>