net: phy: Create sysfs reciprocal links for attached_dev/phydev
There is currently no way for a program scanning /sys to know whether a network device is attached to a particular PHY device, just like the PHY device is not pointed back to its attached network device. Create a symbolic link in the network device's namespace named "phydev" which points to the PHY device and create a symbolic link in the PHY device's namespace named "attached_dev" that points back to the network device. These links are set up during phy_attach_direct() and removed during phy_detach() for symetry. Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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