Trivially implement VIR_CONNECT_BASELINE_CPU_MIGRATABLE for non-x86 cpus

Assume no features block migration.

src/cpu/cpu_aarch64.c

@@ -94,7 +94,8 @@ AArch64Baseline(virCPUDefPtr *cpus,
 {
     virCPUDefPtr cpu = NULL;
 
-    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, NULL);
+    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES |
+                  VIR_CONNECT_BASELINE_CPU_MIGRATABLE, NULL);
 
     if (VIR_ALLOC(cpu) < 0 ||
         VIR_STRDUP(cpu->model, cpus[0]->model) < 0) {

src/cpu/cpu_arm.c

@@ -97,7 +97,8 @@ ArmBaseline(virCPUDefPtr *cpus,
 {
     virCPUDefPtr cpu = NULL;
 
-    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, NULL);
+    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES |
+                  VIR_CONNECT_BASELINE_CPU_MIGRATABLE, NULL);
 
     if (VIR_ALLOC(cpu) < 0 ||
         VIR_STRDUP(cpu->model, cpus[0]->model) < 0) {

src/cpu/cpu_generic.c

@@ -126,7 +126,8 @@ genericBaseline(virCPUDefPtr *cpus,
     unsigned int count;
     size_t i, j;
 
-    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, NULL);
+    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES |
+                  VIR_CONNECT_BASELINE_CPU_MIGRATABLE, NULL);
 
     if (!cpuModelIsAllowed(cpus[0]->model, models, nmodels)) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,

src/cpu/cpu_powerpc.c

@@ -580,7 +580,8 @@ ppcBaseline(virCPUDefPtr *cpus,
     virCPUDefPtr cpu = NULL;
     size_t i;
 
-    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, NULL);
+    virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES |
+                  VIR_CONNECT_BASELINE_CPU_MIGRATABLE, NULL);
 
     if (!(map = ppcLoadMap()))
         goto error;