TPM HMAC Encryption Being Pulled Back To x86_64 By Default For Linux 6.10

One of the new security features coming with Linux 6.10 is TPM bus encryption and integrity protection to fend off a wave of possible attacks against Trusted Platform Module recovery keys, TPM sniffing, etc. This functionality was merged for the Linux 6.10 merge window but is now being pulled back to x86_64-only by default where it's been sufficiently tested...