Merge branch 'bugfix/backport_several_wifi_bugfix_v3.1' into 'release/v3.1'

esp32: backport several WiFi bug fixes to v3.1 (backport v3.1)

See merge request idf/esp-idf!3280

components/esp32/include/esp_wifi_types.h

@@ -392,6 +392,8 @@ typedef struct {
     bool lltf_en;           /**< enable to receive legacy long training field(lltf) data. Default enabled */
     bool htltf_en;          /**< enable to receive HT long training field(htltf) data. Default enabled */
     bool stbc_htltf2_en;    /**< enable to receive space time block code HT long training field(stbc-htltf2) data. Default enabled */
+    bool ltf_merge_en;      /**< enable to generate htlft data by averaging lltf and ht_ltf data when receiving HT packet. Otherwise, use ht_ltf data directly. Default enabled */
+    bool channel_filter_en; /**< enable to turn on channel filter to smooth adjacent sub-carrier. Disable it to keep independence of adjacent sub-carrier. Default enabled */
     bool manu_scale;        /**< manually scale the CSI data by left shifting or automatically scale the CSI data. If set true, please set the shift bits. false: automatically. true: manually. Default false */ 
     uint8_t shift;          /**< manually left shift bits of the scale of the CSI data. The range of the left shift bits is 0~15 */
 } wifi_csi_config_t;