Add counter-delegation-enable - CDE - field introduced by Smcdeleg to menvcfg

[ved-rivos]

Spec: https://github.com/riscv/riscv-smcdeleg-ssccfg/blob/main/body.adoc

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.83%. Comparing base (275f72a) to head (4829f7e).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #235   +/-   ##
=======================================
  Coverage   92.83%   92.83%           
=======================================
  Files           3        3           
  Lines         642      642           
=======================================
  Hits          596      596           
  Misses         46       46           

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