x86: emulation: Disable bloblist for now

x86: emulation: Disable bloblist for now

As reported by Niklas Sombert, enabling bloblist on these platforms
means that we currently don't pass SMBIOS tables on to later stages. For
the v2025.04 release, disable bloblists as that is sufficient to restore
functionality and we will address the underlying problem for the next
release.

Link: https://lore.kernel.org/u-boot/c1dc7446-d1d0-4ef2-b201-09fc612aa8db@uni-duesseldorf.de
Reported-by: Niklas Sombert <niklas.sombert@uni-duesseldorf.de>
Signed-off-by: Tom Rini <trini@konsulko.com>