tests: qemuxml2argv: Remove downstream machine type in 'controller-order' case

Use 'pc' instead of ancient 'rhel-6.1'.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvdata/controller-order.args

@@ -10,7 +10,7 @@ QEMU_AUDIO_DRV=spice \
 /usr/bin/qemu-system-x86_64 \
 -name fdr \
 -S \
--machine rhel6.1.0,accel=kvm,usb=off,dump-guest-core=off \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off \
 -m 4096 \
 -realtime mlock=off \
 -smp 4,sockets=4,cores=1,threads=1 \

tests/qemuxml2argvdata/controller-order.xml

@@ -5,7 +5,7 @@
   <currentMemory unit='KiB'>4194304</currentMemory>
   <vcpu placement='static'>4</vcpu>
   <os>
-    <type arch='x86_64' machine='rhel6.1.0'>hvm</type>
+    <type arch='x86_64' machine='pc'>hvm</type>
     <boot dev='hd'/>
     <boot dev='network'/>
     <boot dev='fd'/>