libmems: Add IioDevice::HasFifo

BUG=b:178060841
TEST=run on kohaku

Cq-Depend: chromium:2639726
Change-Id: I13142da467e0e1c888d6f184f561b2fbd80fefdb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2639725
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Cheng-Hao Yang <chenghaoyang@chromium.org>
Commit-Queue: Cheng-Hao Yang <chenghaoyang@chromium.org>
diff --git a/libmems/iio_device_trigger_impl.h b/libmems/iio_device_trigger_impl.h
index a492e04..741d275 100644
--- a/libmems/iio_device_trigger_impl.h
+++ b/libmems/iio_device_trigger_impl.h
@@ -56,6 +56,9 @@
   }
   bool WriteNumberAttribute(const std::string& name, int64_t value) override;
   bool WriteDoubleAttribute(const std::string& name, double value) override;
+
+  bool HasFifo() const override { return false; }
+
   iio_device* GetUnderlyingIioDevice() const override { return nullptr; }
 
   bool SetTrigger(IioDevice* trigger_device) override { return false; }