iwlwifi: turn on SGI support for VHT 160MHz

Devices supporting VHT 160MHz width are supporting also Short GI.
Turn on this capability in vht cap.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c

@@ -377,8 +377,8 @@ static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg,
 		       IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 
 	if (data->vht160_supported)
-		vht_cap->cap |=
-			IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+		vht_cap->cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
+				IEEE80211_VHT_CAP_SHORT_GI_160;
 
 	if (cfg->vht_mu_mimo_supported)
 		vht_cap->cap |= IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;