qemu: Add missing 'break' statement in couple of switch()-es

In recent commits migration of TPM on shared storage was
introduced. However, I've only complied it with gcc and thus did
not notice that clang build fails due to missing break; at the
end of some (empty) cases in switch() statements.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_domain.c

@@ -1202,6 +1202,7 @@ qemuDomainTPMPrivateFormat(const virDomainTPMDef *tpm,
 
     case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
     case VIR_DOMAIN_TPM_TYPE_LAST:
+        break;
     }
 
     return 0;

src/qemu/qemu_tpm.c

@@ -1019,6 +1019,7 @@ qemuTPMHasSharedStorage(virDomainDef *def)
             return virFileIsSharedFS(tpm->data.emulator.storagepath) == 1;
         case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
         case VIR_DOMAIN_TPM_TYPE_LAST:
+            break;
         }
     }
 
@@ -1038,6 +1039,7 @@ qemuTPMCanMigrateSharedStorage(virDomainDef *def)
             return QEMU_DOMAIN_TPM_PRIVATE(tpm)->swtpm.can_migrate_shared_storage;
         case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
         case VIR_DOMAIN_TPM_TYPE_LAST:
+            break;
         }
     }
     return true;