cpuid: Try to test everything by default

Instead of skipping test cases when the QEMU version or host CPU is
unknown, try to test everything. Unavailable CPU models and
machine-types will generate a SKIP test result, anyway.

There are 473 qemu_cpu test cases, and most of them take around 3
seconds to run.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

qemu/tests/cfg/qemu_cpu.cfg

@@ -154,7 +154,7 @@
                     # config file section somewhere
                     variants:
                         - machine.rhel:
-                            only (qemu_flavor = rhel)
+                            only (qemu_flavor = rhel), (qemu_flavor = unknown)
                             variants:
                                 - rhel600:
                                     machine_type_to_check = "rhel6.0.0"
@@ -169,7 +169,7 @@
                                 - rhel650:
                                     machine_type_to_check = "rhel6.5.0"
                         - machine.upstream:
-                            only (qemu_flavor = upstream)
+                            only (qemu_flavor = upstream), (qemu_flavor = unknown)
                             variants:
                                 - pc_1_0:
                                     machine_type_to_check = "pc-1.0"
@@ -212,6 +212,8 @@
                             # we know those models won't run on Intel hosts on RHEL-6:
                             cpu.intel.486, cpu.intel.pentium, cpu.intel.pentium2, cpu.intel.pentium3:
                                 no (rhel_major_version = 6)..(host_cpu_vendor = intel)
+                                no (qemu_flavor = unknown)..(host_cpu_vendor = intel)
+                                no (host_cpu_vendor = unknown)..(rhel_major_version = 6)
                         - force:
                             only cpu.intel.486, cpu.intel.pentium, cpu.intel.pentium2, cpu.intel.pentium3
                             cpu_model_flags += ",+apic"
@@ -361,9 +363,6 @@
                         only cpu.unset
                         cpu_models = "*"
                     nokvm:
-                        # we don't know if all models will be available if QEMU
-                        # version is unknown:
-                        no (qemu_flavor = unknown)
                         only cpu.intel cpu.amd
                         cpu.intel:
                                 vendor = "GenuineIntel"