driver core: disable revocable code from build

driver core: disable revocable code from build

The revocable code is still under active discussion, and there is no
in-kernel users of it.  So disable it from the build for now so that no
one suffers from it being present in the tree, yet leave it in the
source tree so that others can easily test it by reverting this commit
and building off of it for future releases.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/2026020307-rimmed-dreamy-5a67@gregkh
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>