ARM: dts: imx6sl: add ocram device support

Add ocram device support on i.MX6SL.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6sl.dtsi

@@ -97,6 +97,12 @@ soc {
 		interrupt-parent = <&intc>;
 		ranges;
 
+		ocram: sram@00900000 {
+			compatible = "mmio-sram";
+			reg = <0x00900000 0x20000>;
+			clocks = <&clks IMX6SL_CLK_OCRAM>;
+		};
+
 		L2: l2-cache@00a02000 {
 			compatible = "arm,pl310-cache";
 			reg = <0x00a02000 0x1000>;