net: bridge: Bounce invalid boolopts

The bridge driver currently tolerates options that it does not recognize.
Instead, it should bounce them.

Fixes: a428afe8 ("net: bridge: add support for user-controlled bool options")
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/e6fdca3b5a8d54183fbda075daffef38bdd7ddce.1757070067.git.petrm@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>