Add esp_timer_is_active function for Nimble stack to use esp_timer instead of FreeRTOS timer

components/bt/host/nimble/Kconfig.in

@@ -500,3 +500,9 @@ config BT_NIMBLE_BLUFI_ENABLE
     default n
     help
         Set this option to enable blufi functionality.
+
+config BT_NIMBLE_USE_ESP_TIMER
+    bool "Enable Esp Timer for Nimble"
+    default y
+    help
+        Set this option to use Esp Timer which has higher priority timer instead of FreeRTOS timer

components/bt/host/nimble/port/include/esp_nimble_cfg.h

@@ -1374,4 +1374,12 @@
 #define MYNEWT_VAL_NEWT_FEATURE_LOGCFG (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_USE_ESP_TIMER
+#ifdef CONFIG_BT_NIMBLE_USE_ESP_TIMER
+#define MYNEWT_VAL_BLE_USE_ESP_TIMER (1)
+#else
+#define MYNEWT_VAL_BLE_USE_ESP_TIMER (0)
+#endif
+#endif
+
 #endif