bnx2x: Fix link problem with some DACs

Change 2wire transfer rate of SFP+ module EEPROM from 400Khz to 100Khz
since some DACs(direct attached cables) do not work at 400Khz.

Reported-by: Krzysztof Oldzki <ole@ans.pl>
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2x_link.c

@@ -4266,14 +4266,16 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars)
 					       MDIO_PMA_REG_10G_CTRL2, 0x0008);
 			}
 
-			/* Set 2-wire transfer rate to 400Khz since 100Khz
-			is not operational */
+			/* Set 2-wire transfer rate of SFP+ module EEPROM
+			 * to 100Khz since some DACs(direct attached cables) do
+			 * not work at 400Khz.
+			 */
 			bnx2x_cl45_write(bp, params->port,
 				       ext_phy_type,
 				       ext_phy_addr,
 				       MDIO_PMA_DEVAD,
 				       MDIO_PMA_REG_8727_TWO_WIRE_SLAVE_ADDR,
-				       0xa101);
+				       0xa001);
 
 			/* Set TX PreEmphasis if needed */
 			if ((params->feature_config_flags &