change machine name ppce500v2 to ppce500

ppce500v2 is not machine supported by official release of QEMU.
It should be replaced by ppce500.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

docs/schemas/domaincommon.rng

@@ -371,7 +371,7 @@
             <value>g3beige</value>
             <value>mac99</value>
             <value>prep</value>
-            <value>ppce500v2</value>
+            <value>ppce500</value>
           </choice>
         </attribute>
       </optional>

tests/qemuxml2argvdata/qemuxml2argv-ppc-dtb.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
-/usr/bin/qemu-system-ppc -S -M ppce500v2 -m 256 -smp 1 -nographic \
+/usr/bin/qemu-system-ppc -S -M ppce500 -m 256 -smp 1 -nographic \
 -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c \
 -kernel /media/ram/uImage -initrd /media/ram/ramdisk \
 -append 'root=/dev/ram rw console=ttyS0,115200' -dtb /media/ram/test.dtb \

tests/qemuxml2argvdata/qemuxml2argv-ppc-dtb.xml

@@ -5,7 +5,7 @@
   <currentMemory unit='KiB'>262144</currentMemory>
   <vcpu placement='static'>1</vcpu>
   <os>
-    <type arch='ppc' machine='ppce500v2'>hvm</type>
+    <type arch='ppc' machine='ppce500'>hvm</type>
     <kernel>/media/ram/uImage</kernel>
     <initrd>/media/ram/ramdisk</initrd>
     <cmdline>root=/dev/ram rw console=ttyS0,115200</cmdline>

tests/testutilsqemu.c

@@ -91,7 +91,7 @@ static int testQemuAddPPCGuest(virCapsPtr caps)
     static const char *machine[] = { "g3beige",
                                      "mac99",
                                      "prep",
-                                     "ppce500v2" };
+                                     "ppce500" };
     virCapsGuestMachinePtr *machines = NULL;
     virCapsGuestPtr guest;