WiFi: Add support for ESP32S2

1) Update WiFi and PHY libs for ESP32S2.
2) Remove KConfig options ESP32S2 PHY lib selection.
3) Change target macros from ESP32S2BETA to ESP32S2

components/esp_wifi/include/esp_private/wifi_os_adapter.h

@@ -107,7 +107,7 @@ typedef struct {
     int32_t (* _get_random)(uint8_t *buf, size_t len);
     int32_t (* _get_time)(void *t);
     unsigned long (* _random)(void);
-#if CONFIG_IDF_TARGET_ESP32S2BETA
+#if CONFIG_IDF_TARGET_ESP32S2
     uint32_t (* _slowclk_cal_get)(void);
 #endif
     void (* _log_write)(uint32_t level, const char* tag, const char* format, ...);

components/esp_wifi/include/esp_wifi_types.h

@@ -325,7 +325,7 @@ typedef struct {
     unsigned sgi:1;               /**< Short Guide Interval(SGI). 0: Long GI; 1: Short GI */
 #if CONFIG_IDF_TARGET_ESP32
     signed noise_floor:8;         /**< noise floor of Radio Frequency Module(RF). unit: 0.25dBm*/
-#elif CONFIG_IDF_TARGET_ESP32S2BETA
+#elif CONFIG_IDF_TARGET_ESP32S2
     unsigned :8;
 #endif
     unsigned ampdu_cnt:8;         /**< ampdu cnt */
@@ -333,10 +333,15 @@ typedef struct {
     unsigned secondary_channel:4; /**< secondary channel on which this packet is received. 0: none; 1: above; 2: below */
     unsigned :8;                  /**< reserve */
     unsigned timestamp:32;        /**< timestamp. The local time when this packet is received. It is precise only if modem sleep or light sleep is not enabled. unit: microsecond */
+#if CONFIG_IDF_TARGET_ESP32
     unsigned :32;                 /**< reserve */
     unsigned :31;                 /**< reserve */
     unsigned ant:1;               /**< antenna number from which this packet is received. 0: WiFi antenna 0; 1: WiFi antenna 1 */
-#if CONFIG_IDF_TARGET_ESP32S2BETA
+#elif CONFIG_IDF_TARGET_ESP32S2
+    unsigned :32;
+    unsigned :32;
+#endif
+#if CONFIG_IDF_TARGET_ESP32S2
     signed noise_floor:8;         /**< noise floor of Radio Frequency Module(RF). unit: 0.25dBm*/
     unsigned :24;
 #endif