misc: set the communication vUART default type to PCI

The current code use the legacy as the default type of communication
vUART, these were only 4 standard vUART ports, others should config by
the /etc/serial.conf, so this patch change the default type to PCI
which could be used without config files.

Tracked-On: #6690
Signed-off-by: Chenli Wei <chenli.wei@linux.intel.com>

misc/config_tools/configurator/packages/configurator/src/pages/Config/ConfigForm/CustomWidget/VUART.vue

@@ -219,7 +219,7 @@ export default {
       }
       this.defaultVal.splice(index + 1, 0, {
         "name": "Connection_" + this.defaultVal.length,
-        "type": "legacy",
+        "type": "pci",
         "endpoint": [
           {
             "vm_name": "",