Force simple NSR based PHY polling


Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Force simple NSR based PHY polling
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This configuration forces the DM9000 to use the NSR's LinkStatus
bit to determine if the link is up or down instead of the more
costly MII PHY reads. Note, this will not work if the chip is
operating with an external PHY.