[otp_ctrl] Update hjson file according to newest spec
[otp_ctrl] Update hjson file according to newest spec

This updates the hjson file according to the newest OTP controller
specification. The markdown documentation will follow in a subsequent
commit.

Note that there are still several TODOs in this file that will have to
be addressed during implementation and top-level integration.

Signed-off-by: Michael Schaffner <a005a2d3342a687ea2d05360c953107acbe83e08@opentitan.org>

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