e1000e: potentially incorrect return for e1000_cfg_kmrn_10_100_80003es2lan

In the unlikely event that e1e_wphy() returns an error, the returned error
code value is not propogated to the caller of
e1000_cfg_kmrn_10_100_80003es2lan().
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e1000e/80003es2lan.c

@@ -1225,9 +1225,7 @@ static s32 e1000_cfg_kmrn_10_100_80003es2lan(struct e1000_hw *hw, u16 duplex)
 	else
 		reg_data &= ~GG82563_KMCR_PASS_FALSE_CARRIER;
 
-	ret_val = e1e_wphy(hw, GG82563_PHY_KMRN_MODE_CTRL, reg_data);
-
-	return 0;
+	return e1e_wphy(hw, GG82563_PHY_KMRN_MODE_CTRL, reg_data);
 }
 
 /**