ARM: dts: imx53: Fix sram.yaml warnings

Add ranges, #address-cells and #size-cells properties to the sram
node to fix the following warnings when checking sram.yaml:

make dtbs_check DT_SCHEMA_FILES=sram.yaml
...
DTC_CHK arch/arm/boot/dts/imx53-qsb.dtb
arch/arm/boot/dts/imx53-qsb.dtb: sram@f8000000: '#address-cells' is a required property
From schema: Documentation/devicetree/bindings/sram/sram.yaml
/home/fabio/linux-next/arch/arm/boot/dts/imx53-qsb.dtb: sram@f8000000: '#size-cells' is a required property
From schema: Documentation/devicetree/bindings/sram/sram.yaml
/home/fabio/linux-next/arch/arm/boot/dts/imx53-qsb.dtb: sram@f8000000: 'ranges' is a required property
From schema: Documentation/devicetree/bindings/sram/sram.yaml

Signed-off-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx53.dtsi

···
 		ocram: sram@f8000000 {
 			compatible = "mmio-sram";
 			reg = <0xf8000000 0x20000>;
+			ranges = <0 0xf8000000 0x20000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
 			clocks = <&clks IMX5_CLK_OCRAM>;
 		};
 	};