built tonga_mm_dep_overflow
--- run ---
[DF-1271] tonga mm_dep_table->count -> UvdLevel/VceLevel/AcpLevel[8] overflow.
[DF-1271] Sink in loadable amdgpu.ko (module-only); driven by VBIOS on AMD
[DF-1271] Tonga hardware.  Not triggerable on this QEMU guest.
[DF-1271] Bug confirmed in source; see VERDICT.md + fix.diff.