Fix problem discovered with direct kernel boot for SLES 10 and SLES 11 guests (bnc#880625)
Only build x86 firmware on x86, to avoid randomly getting the upstream binary firmware blobs packaged, instead of the ones we try to build.
Add probing of vhost-net for SLE11 host in udev rules file.
Get rid of pmtools Buildrequires for old distros - I checked, we can't build the firmware as is for old distros correctly.
OBS-URL: https://build.opensuse.org/request/show/236077
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=213