Merge pull request adafruit#9453 from dhalbert/9.1.x-fix-nordic-restart-crash

bleio_user_reset(): check if BLE running before doing any BLE ops

Author: dhalbert

ports/nordic/common-hal/_bleio/__init__.c

@@ -78,9 +78,11 @@ void common_hal_bleio_init(void) {
 }
 
 void bleio_user_reset() {
-    // Stop any user scanning or advertising.
-    common_hal_bleio_adapter_stop_scan(&common_hal_bleio_adapter_obj);
-    common_hal_bleio_adapter_stop_advertising(&common_hal_bleio_adapter_obj);
+    if (common_hal_bleio_adapter_get_enabled(&common_hal_bleio_adapter_obj)) {
+        // Stop any user scanning or advertising.
+        common_hal_bleio_adapter_stop_scan(&common_hal_bleio_adapter_obj);
+        common_hal_bleio_adapter_stop_advertising(&common_hal_bleio_adapter_obj);
+    }
 
     ble_drv_remove_heap_handlers();