[otbn,lint] Waive unused sec_wipe signals
[otbn,lint] Waive unused sec_wipe signals

These cause lint errors. Since it's going to be a bit of time until we
connect them up properly, waive them for now.

Signed-off-by: Rupert Swarbrick <290093e2ad2515ed2f14d749293c8cf8e02ca274@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan