linux-firmware does not carry any microcode update for Renoir (yet). Or what do you mean by "TFA"?
The fixed Renoir microcode should have revision >= 0x0860010b as per the kernel: https://github.com/torvalds/linux/commit/522b1d69219d8f08317...
The fixed Renoir microcode should have revision >= 0x0860010b as per the kernel: https://github.com/torvalds/linux/commit/522b1d69219d8f08317...
Updated microcode shows 0x08600106 revision so I guess that explains it.