Revert "net: core: 'ethtool' issue with querying phy settings"

Revert "net: core: 'ethtool' issue with querying phy settings"

This reverts commit 30a3e8813e0e91234a1bd0e5620273d8aef1ab39.

It isn't right, ethtool is meant to manage one PHY instance
per netdevice at a time, and this is selected by the SET
command.  Therefore by definition the GET command must only
return the settings for the configured and selected PHY.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>