The collision detection setting was invalid.
When collision occurred, because data was not resent,
there was an issue to which a transmitting throughput falls.
This patch enables the collision detection.
Signed-off-by: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
        PCH_GBE_CHIP_TYPE_INTERNAL | \
-       PCH_GBE_RGMII_MODE_RGMII   | \
-       PCH_GBE_CRS_SEL              \
+       PCH_GBE_RGMII_MODE_RGMII     \
        )
 
 /* Ethertype field values */