qemuDomainDefAddDefaultDevices: Handle defaults for all ARM arches together

Most machine types are avaliable in all arches by qemu. This is also
true for the 'versatilepb' machine type example in the tests.

Move all the ARM architectures together so that they are handled in
sync.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>

tests/qemuxmlconfdata/aarch64-versatilepb-minimal.aarch64-latest.abi-update.xml

@@ -15,6 +15,7 @@
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/bin/qemu-system-aarch64</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
     <audio id='1' type='none'/>
     <memballoon model='none'/>
   </devices>

tests/qemuxmlconfdata/aarch64-versatilepb-minimal.aarch64-latest.xml

@@ -15,6 +15,7 @@
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/bin/qemu-system-aarch64</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
     <audio id='1' type='none'/>
     <memballoon model='none'/>
   </devices>

tests/qemuxmlconfdata/armv7l-versatilepb-minimal.armv7l-latest.abi-update.xml

@@ -17,6 +17,7 @@
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/bin/qemu-system-armv7l</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
     <audio id='1' type='none'/>
     <memballoon model='none'/>
   </devices>

tests/qemuxmlconfdata/armv7l-versatilepb-minimal.armv7l-latest.xml

@@ -17,6 +17,7 @@
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/bin/qemu-system-armv7l</emulator>
+    <controller type='pci' index='0' model='pci-root'/>
     <audio id='1' type='none'/>
     <memballoon model='none'/>
   </devices>