arm: dts: ea3250/phy3250: specify phys memory offset for lpc32xx boards

In case if SDRAM memory region is not populated by a bootloader,
provide this value in device trees for EA3250 and PHY3250 boards.
Signed-off-by: NVladimir Zapolskiy <vz@mleia.com>

arch/arm/boot/dts/ea3250.dts

@@ -22,7 +22,7 @@
 
 	memory {
 		device_type = "memory";
-		reg = <0 0x4000000>;
+		reg = <0x80000000 0x4000000>;
 	};
 
 	ahb {

arch/arm/boot/dts/phy3250.dts

@@ -22,7 +22,7 @@
 
 	memory {
 		device_type = "memory";
-		reg = <0 0x4000000>;
+		reg = <0x80000000 0x4000000>;
 	};
 
 	ahb {