ARM: dts: lpc32xx: phy3250: add NAND partitions device node

To declare MTD OF partitions NAND controller device node should have
a special 'partitions' subnode, the change removes a debug message
from mtd/ofpart on boot:

  nxp_lpc3220_slc: 'partitions' subnode not found on /ahb/flash@20020000.
  Trying to parse direct subnodes as partitions.
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

arch/arm/boot/dts/phy3250.dts

@@ -136,8 +136,6 @@ &sd {
 
 /* 64MB Flash via SLC NAND controller */
 &slc {
-	#address-cells = <1>;
-	#size-cells = <1>;
 	status = "okay";
 
 	nxp,wdr-clks = <14>;
@@ -151,31 +149,37 @@ &slc {
 	nand-on-flash-bbt;
 	gpios = <&gpio 5 19 1>; /* GPO_P3 19, active low */
 
-	mtd0@00000000 {
-		label = "phy3250-boot";
-		reg = <0x00000000 0x00064000>;
-		read-only;
-	};
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
 
-	mtd1@00064000 {
-		label = "phy3250-uboot";
-		reg = <0x00064000 0x00190000>;
-		read-only;
-	};
+		mtd0@00000000 {
+			label = "phy3250-boot";
+			reg = <0x00000000 0x00064000>;
+			read-only;
+		};
 
-	mtd2@001f4000 {
-		label = "phy3250-ubt-prms";
-		reg = <0x001f4000 0x00010000>;
-	};
+		mtd1@00064000 {
+			label = "phy3250-uboot";
+			reg = <0x00064000 0x00190000>;
+			read-only;
+		};
 
-	mtd3@00204000 {
-		label = "phy3250-kernel";
-		reg = <0x00204000 0x00400000>;
-	};
+		mtd2@001f4000 {
+			label = "phy3250-ubt-prms";
+			reg = <0x001f4000 0x00010000>;
+		};
 
-	mtd4@00604000 {
-		label = "phy3250-rootfs";
-		reg = <0x00604000 0x039fc000>;
+		mtd3@00204000 {
+			label = "phy3250-kernel";
+			reg = <0x00204000 0x00400000>;
+		};
+
+		mtd4@00604000 {
+			label = "phy3250-rootfs";
+			reg = <0x00604000 0x039fc000>;
+		};
 	};
 };