staging/rdma/hfi1: Report physical state changes per device instead of globally

Make physical state change reporting be per-device, not global
to reduce excessive reports of "physical state changed"

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>