tests: update iface_options for PPC64 QEMU

Adjust iface_options.py to fix PPC64 QEMU network behavior

Author: Aniket Sahu

libvirt/tests/src/virtual_network/iface_options.py

@@ -294,7 +294,7 @@ def run_cmdline_test(iface_mac, host_arch):
         :raise avocado.core.exceptions.TestFail: if commandline doesn't match
         :return: None
         """
-        cmd = ("ps -ef | grep %s | grep qemu-kvm | grep -v grep " % vm_name)
+        cmd = ("ps -ef | grep %s | grep qemu-system-ppc64 | grep -v grep " % vm_name)
         ret = process.run(cmd, shell=True)
         logging.debug("Command line %s", ret.stdout_text)
         if test_vhost_net: