Always add -no-kvm and -no-kqemu, for qemu domains

If the qemu binary supports "-no-kvm" and/or "-no-kqemu", they should
always be added for plain "qemu" domains.  Previously, we omitted them
whenever the host and guest architectures implied that they would be
disabled automatically, but that logic was flawed in some cases
(such as i686 and x86_64).
* src/qemu_conf.c: fix the conditions for adding "-no-kvm" and/or "-no-kqemu"

src/qemu_conf.c

@@ -1143,22 +1143,18 @@ int qemudBuildCommandLine(virConnectPtr conn,
     emulator = def->emulator;
 
     /* Need to explicitly disable KQEMU if
-     * 1. Arch matches host arch
-     * 2. Guest domain is 'qemu'
-     * 3. The qemu binary has the -no-kqemu flag
+     * 1. Guest domain is 'qemu'
+     * 2. The qemu binary has the -no-kqemu flag
      */
     if ((qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU) &&
-        STREQ(ut.machine, def->os.arch) &&
         def->virtType == VIR_DOMAIN_VIRT_QEMU)
         disableKQEMU = 1;
 
     /* Need to explicitly disable KVM if
-     * 1. Arch matches host arch
-     * 2. Guest domain is 'qemu'
-     * 3. The qemu binary has the -no-kvm flag
+     * 1. Guest domain is 'qemu'
+     * 2. The qemu binary has the -no-kvm flag
      */
     if ((qemuCmdFlags & QEMUD_CMD_FLAG_KVM) &&
-        STREQ(ut.machine, def->os.arch) &&
         def->virtType == VIR_DOMAIN_VIRT_QEMU)
         disableKVM = 1;