Add feature Smcdeleg#1913

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JJ-Gaisler wants to merge 3 commits intoriscv-software-src:masterfrom

JJ-Gaisler:feature_smcdeleg2

Commits on Feb 11, 2025

Fix issues with smcsrind not considering stateen, throw illegal on
JJ-Gaisler
committed
Add const csr hedelegh and masks for stateen.priv113/stateen.context
JJ-Gaisler
committed
Add SMCDELEG extension and update encoding.h
JJ-Gaisler
committed