[otp_ctrl] set idle_o bit in otp_ctrl_lci
[otp_ctrl] set idle_o bit in otp_ctrl_lci

This PR adds the logic to set `lci_idle_o` to 1 at IdleSt.

Signed-off-by: Cindy Chen <399ad771a111eac8923348b1e2af093034e5d4f1@google.com>

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