intel: comprehensive workaround infrastructure + Gen4-Gen12 initial tables
Replace the ad-hoc 113-line workaround module with a proper data model:
- Workaround struct: offset, clear, set, read_mask, masked, name
- WorkaroundList: sorted Vec with automatic merge/dedup at same offset
- apply(): read-modify-write with masked-register and write-only support
- verify(): post-application validation against read_mask
- Helper functions: wa_masked_en/dis/field_set, wa_write/or/clr/clr_set
- MCR variants: aliases to regular helpers (no MCR steering yet)
Tables ported from Linux 7.1 intel_workarounds.c:
- GT workarounds: gen4, g4x, ilk, snb, ivb, hsw, gen9, icl(gen9.5), gen12
- Context workarounds: gen6, gen7, gen8, gen9, icl, gen12
- Engine workarounds: general_render_compute
- Whitelist: gen9, icl, gen12
0 compilation errors.
Red Bear
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