[otbn,dv] Actually check reg read values in the scoreboard
[otbn,dv] Actually check reg read values in the scoreboard

I thought this was happening in the base class, but it seems not.
Oops! Turn on the checks.

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

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