Luckly for you, the consensus from the kernel developers seems to be that these firmwares are only problematic if the new anti-Spectre features they expose to t

Luckly for you, the consensus from the kernel developers seems to be that these firmwares are only problematic if the new anti-Spectre features they expose to the kernel are actually used. The current upstream kernel doesn't use them, and the next upstream kernel will have a blacklist of the problematic firmware versions, so unless you distro patched the kernel to use these features without the blacklist, you should be safe.