serial port.
 
    Required properties:
-     - device_type : "serial"
      - compatible : "marvell,mv64360-mpsc"
      - reg : Offset and length of the register set for this device
      - sdma : the phandle for the SDMA node used by this port
 
    Example Discovery MPSCINTR node:
      mpsc@8000 {
-            device_type = "serial";
             compatible = "marvell,mv64360-mpsc";
             reg = <0x8000 0x38>;
             virtual-reg = <0xf1008000>;
 
                };
 
                MPSC0: mpsc@8000 {
-                       device_type = "serial";
                        compatible = "marvell,mv64360-mpsc";
                        reg = <0x8000 0x38>;
                        virtual-reg = <0xd8008000>;
                };
 
                MPSC1: mpsc@9000 {
-                       device_type = "serial";
                        compatible = "marvell,mv64360-mpsc";
                        reg = <0x9000 0x38>;
                        virtual-reg = <0xd8009000>;
 
                };
 
                MPSC0: mpsc@8000 {
-                       device_type = "serial";
                        compatible = "marvell,mv64360-mpsc";
                        reg = <0x8000 0x38>;
                        virtual-reg = <0xf1008000>;
                };
 
                MPSC1: mpsc@9000 {
-                       device_type = "serial";
                        compatible = "marvell,mv64360-mpsc";
                        reg = <0x9000 0x38>;
                        virtual-reg = <0xf1009000>;
 
        int err;
 
        id = 0;
-       for_each_compatible_node(np, "serial", "marvell,mv64360-mpsc") {
+       for_each_compatible_node(np, NULL, "marvell,mv64360-mpsc") {
                err = mv64x60_mpsc_device_setup(np, id++);
                if (err)
                        printk(KERN_ERR "Failed to initialize MV64x60 "
 
        if (!stdout)
                return;
 
-       for_each_compatible_node(np, "serial", "marvell,mv64360-mpsc") {
+       for_each_compatible_node(np, NULL, "marvell,mv64360-mpsc") {
                if (np == stdout)
                        break;
        }