i40e: Set fec_config when forcing link state

This patch configures FEC setting in i40e_force_link_state().
For some reason setting this field was overlooked thus causing
25G link to be configured incorrectly.

Signed-off-by: Mariusz Stachura <mariusz.stachura@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -6597,6 +6597,8 @@ static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
 	config.eee_capability = abilities.eee_capability;
 	config.eeer = abilities.eeer_val;
 	config.low_power_ctrl = abilities.d3_lpan;
+	config.fec_config = abilities.fec_cfg_curr_mod_ext_info &
+			    I40E_AQ_PHY_FEC_CONFIG_MASK;
 	err = i40e_aq_set_phy_config(hw, &config, NULL);
 
 	if (err) {