Cargue varias imágenes y almacene su ruta en la base de datos

Tu $filepath variable y su query tiene que estar en tu bucle.

También está utilizando mysql_query que no es compatible con mysqli_ funciones.

Esas dos API no mezclar todo junto. Usa mysqli_query mientras le pasa la conexión DB.

<?php
$con=mysqli_connect("abc.com","abc","ab","abc");
// Check connection
if (mysqli_connect_errno()) 
    {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }

if(isset($_POST['submit']))           
{
 extract($_POST);

    if(isset($_FILES['support_images']['name']))
    {
        $file_name_all="";
        for($i=0; $i<count($_FILES['support_images']['name']); $i++) 
        {
               $tmpFilePath = $_FILES['support_images']['tmp_name'][$i];    
               if ($tmpFilePath != "")
               {    
                   $path = "propertyimages/"; // create folder 
                   $name = $_FILES['support_images']['name'][$i];
                  $size = $_FILES['support_images']['size'][$i];

                   list($txt, $ext) = explode(".", $name);
                   $file= time().substr(str_replace(" ", "_", $txt), 0);
                   $info = pathinfo($file);
                   $filename = $file.".".$ext;
                   if(move_uploaded_file($_FILES['support_images']['tmp_name'][$i], $path.$filename)) 
                   { 
                      $file_name_all.=$filename."*";
                   }
             }
              $filepath = rtrim($file_name_all, '*').$path;    
         $query=mysqli_query($con,"INSERT into propertyimages (`propertyimage`) VALUES('".addslashes($filepath)."'); ");
        }

    }
    else
    {
        $filepath="";
    }

    if($query)
    {
       header("Location: admin_profile.php");
    }
}