[otp_ctrl,lint] Add an explicit parameter for NumLcOtpWords - 1
[otp_ctrl,lint] Add an explicit parameter for NumLcOtpWords - 1

This allows us to slice out just the bits in question (next to the
definition of CntWidth, which shows why this is valid) and silence a
Verilator width mismatch warning.

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

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