arm: dts: socfpga: Add OCRAM node

Add a 64KB ocram node for SOCFPGA.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>

arch/arm/boot/dts/socfpga.dtsi

@@ -639,6 +639,11 @@ mmc: dwmmc0@ff704000 {
 			clock-names = "biu", "ciu";
 		};
 
+		ocram: sram@ffff0000 {
+			compatible = "mmio-sram";
+			reg = <0xffff0000 0x10000>;
+		};
+
 		/* Local timer */
 		timer@fffec600 {
 			compatible = "arm,cortex-a9-twd-timer";