Change vlan device name

Modification:
        Function:  register_vlan_device()
        Location:  net/8021q/vlan.c
 
static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
{
                   ……
                   switch (vn->name_type) {
                   ……
                   case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
//
snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
snprintf(name, IFNAMSIZ, "%s%i", "eth", vlan_id);
                                      break;
                   case VLAN_NAME_TYPE_PLUS_VID:
                                      /* Put our vlan.VID in the name.
                                       * Name will look like:    vlan0005
                                       */
                   default:
                                      snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
                   }
                   ……
}