linux-phytec-fsl

IB/mlx4: Support device FW version string

And remove the sysfs in favor of common core version.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>