cchost: Disable CephFS BUG=b/556391634 TEST=presubmit RELEASE_NOTE=None Signed-off-by: Kevin Berry <kpberry@google.com> Change-Id: Ic8631733ec43692fa84dd3def08a9cad09f2a690 Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/203286 Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>