qemu: support ich9-intel-hda audio device

This resolves one of the issues in:

   https://bugzilla.redhat.com/show_bug.cgi?id=1003983

This device is identical to qemu's "intel-hda" device (known as "ich6"
in libvirt), but has a different PCI device ID (which matches the ID
of the hda audio built into the ich9 chipset, of course). It's not
supported in earlier versions of qemu, so it requires a capability
bit.

tests/qemuxml2argvdata/qemuxml2argv-sound-device.args

@@ -9,4 +9,9 @@ id=sound4-codec0,bus=sound4.0,cad=0 \
 -device intel-hda,id=sound5,bus=pci.0,addr=0x6 \
 -device hda-micro,id=sound5-codec0,bus=sound5.0,cad=0 \
 -device hda-duplex,id=sound5-codec1,bus=sound5.0,cad=1 \
--device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7
+-device ich9-intel-hda,id=sound6,bus=pci.0,addr=0x7 -device hda-duplex,\
+id=sound6-codec0,bus=sound6.0,cad=0 \
+-device ich9-intel-hda,id=sound7,bus=pci.0,addr=0x8 \
+-device hda-micro,id=sound7-codec0,bus=sound7.0,cad=0 \
+-device hda-duplex,id=sound7-codec1,bus=sound7.0,cad=1 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x9

tests/qemuxml2argvdata/qemuxml2argv-sound-device.xml

@@ -31,6 +31,11 @@
       <codec type='micro'/>
       <codec type='duplex'/>
     </sound>
+    <sound model='ich9'/>
+    <sound model='ich9'>
+      <codec type='micro'/>
+      <codec type='duplex'/>
+    </sound>
     <memballoon model='virtio'/>
   </devices>
 </domain>

tests/qemuxml2argvtest.c

@@ -855,7 +855,8 @@ mymain(void)
     DO_TEST("sound", NONE);
     DO_TEST("sound-device",
             QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
-            QEMU_CAPS_HDA_DUPLEX, QEMU_CAPS_HDA_MICRO);
+            QEMU_CAPS_HDA_DUPLEX, QEMU_CAPS_HDA_MICRO,
+            QEMU_CAPS_DEVICE_ICH9_INTEL_HDA);
     DO_TEST("fs9p",
             QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_FSDEV,
             QEMU_CAPS_FSDEV_WRITEOUT);