i40e: Fix led blink capability for 10GBaseT PHY

i40e: Fix led blink capability for 10GBaseT PHY

Orabug: 22342532

This patch fixes a problem where the ethtool identify adapter
functionality did not work for some copper PHY's.  Without this
patch, the blink led functionality fails on some parts.  This
patch adds PHY write code to blink led's on parts where this
functionality is contained in the PHY rather than the MAC.

Change-ID: Iee7b3453f61d5ffd0b3d03f720ee4f17f919fcc2
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 31b606d0c40a1435c54bff18e4d3d3c33af1c3cf)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/intel/i40e/i40e.h