feat(log): add esp_log to internal wifi lib

components/log/include/esp_log.h

@@ -78,6 +78,20 @@ void esp_log_level_set(const char* tag, esp_log_level_t level);
  */
 putchar_like_t esp_log_set_putchar(putchar_like_t func);
 
+/**
+ * @brief Function which returns timestamp to be used in log output
+ *
+ * This function is used in expansion of ESP_LOGx macros.
+ * In the 2nd stage bootloader, and at early application startup stage
+ * this function uses CPU cycle counter as time source. Later when
+ * FreeRTOS scheduler start running, it switches to FreeRTOS tick count.
+ *
+ * For now, we ignore millisecond counter overflow.
+ *
+ * @return timestamp, in milliseconds
+ */
+uint32_t esp_log_timestamp(void);
+
 /**
  * @brief Function which returns timestamp to be used in log output
  *