i386: Build SEV only for 64-bit target

Recent changes broke build on 32-bit host. Since there is no 32-bit
support, restrict SEV to 64-bit.

Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250716071554.377356-1-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
1 file changed