tests: Add tests for kvm-poll-control feature

Update the KVM feature tests for QEMU's kvm-poll-control performance
hint.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvdata/kvm-features-off.xml

@@ -13,6 +13,7 @@
     <kvm>
       <hidden state='off'/>
       <hint-dedicated state='off'/>
+      <poll-control state='off'/>
     </kvm>
   </features>
   <clock offset='utc'/>

tests/qemuxml2argvdata/kvm-features.args

@@ -11,7 +11,7 @@ QEMU_AUDIO_DRV=none \
 -name QEMUGuest1 \
 -S \
 -machine pc,accel=kvm,usb=off,dump-guest-core=off \
--cpu host,kvm=off,kvm-hint-dedicated=on \
+-cpu host,kvm=off,kvm-hint-dedicated=on,kvm-poll-control=on \
 -m 214 \
 -realtime mlock=off \
 -smp 6,sockets=6,cores=1,threads=1 \

tests/qemuxml2argvdata/kvm-features.xml

@@ -13,6 +13,7 @@
     <kvm>
       <hidden state='on'/>
       <hint-dedicated state='on'/>
+      <poll-control state='on'/>
     </kvm>
   </features>
   <cpu mode='host-passthrough' check='none'/>

tests/qemuxml2xmloutdata/kvm-features-off.xml

@@ -13,6 +13,7 @@
     <kvm>
       <hidden state='off'/>
       <hint-dedicated state='off'/>
+      <poll-control state='off'/>
     </kvm>
   </features>
   <clock offset='utc'/>

tests/qemuxml2xmloutdata/kvm-features.xml

@@ -13,6 +13,7 @@
     <kvm>
       <hidden state='on'/>
       <hint-dedicated state='on'/>
+      <poll-control state='on'/>
     </kvm>
   </features>
   <cpu mode='host-passthrough' check='none' migratable='off'/>