target-i386: Explicitly set vendor for each built-in cpudef Since cpudef config is not supported anymore and all remaining sources now always set x86_def_t.vendor[123] fields, remove setting default vendor to simplify future re-factoring. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>