built tonga_sclk_voltage_offset_overflow
--- run ---
[DF-1272] tonga sclk_table->count -> Sclk_voltageOffset[8] overflow.
[DF-1272] Sink in loadable amdgpu.ko (module-only); driven by VBIOS on
[DF-1272] AMD Tonga hardware (clock-stretcher cap).  Not triggerable on
[DF-1272] this QEMU guest.  Bug confirmed in source; see VERDICT.md + fix.diff.