iwlwifi: add vendor specific capabilities for some RFs

On some RFs we want to advertise vendor specific capabilities to
indicate support for improved beamforming rates and/or on 160 MHz,
some APs where Intel has collaborated with the vendor will use it
to improve behaviour. Add these elements where relevant, i.e. for
HR and GF RFs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211017113927.510f0ef9c2d5.If99bdb9009583ac7cc6cbb708e871a67df836dbe@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

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

@@ -534,6 +534,17 @@ static void iwl_init_vht_hw_capab(struct iwl_trans *trans,
 		cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
 }
 
+static const u8 iwl_vendor_caps[] = {
+	0xdd,			/* vendor element */
+	0x06,			/* length */
+	0x00, 0x17, 0x35,	/* Intel OUI */
+	0x08,			/* type (Intel Capabilities) */
+	/* followed by 16 bits of capabilities */
+#define IWL_VENDOR_CAP_IMPROVED_BF_FDBK_HE	BIT(0)
+	IWL_VENDOR_CAP_IMPROVED_BF_FDBK_HE,
+	0x00
+};
+
 static const struct ieee80211_sband_iftype_data iwl_he_capa[] = {
 	{
 		.types_mask = BIT(NL80211_IFTYPE_STATION),
@@ -781,6 +792,12 @@ iwl_nvm_fixup_sband_iftd(struct iwl_trans *trans,
 	if (fw_has_capa(&fw->ucode_capa, IWL_UCODE_TLV_CAPA_BROADCAST_TWT))
 		iftype_data->he_cap.he_cap_elem.mac_cap_info[2] |=
 			IEEE80211_HE_MAC_CAP2_BCAST_TWT;
+
+	if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_22000 &&
+	    !is_ap) {
+		iftype_data->vendor_elems.data = iwl_vendor_caps;
+		iftype_data->vendor_elems.len = ARRAY_SIZE(iwl_vendor_caps);
+	}
 }
 
 static void iwl_init_he_hw_capab(struct iwl_trans *trans,