ARM: dts: OMAP2+: Add compatible property to onenand node

OMAP onenand nodes are missing compatible property, add it.

Signed-off-by: Ladislav Michl <[e-mail]>
Reviewed-by: Peter Ujfalusi <[e-mail]>
Acked-by: Roger Quadros <[e-mail]>
Acked-by: Tony Lindgren <[e-mail]>
Tested-by: Tony Lindgren <[e-mail]>
Tested-by: Aaro Koskinen <[e-mail]>
Signed-off-by: Boris Brezillon <[e-mail]>

arch/arm/boot/dts/omap2420-n8x0-common.dtsi

···
 	onenand@0,0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
+		compatible = "ti,omap2-onenand";
 		reg = <0 0 0x20000>;	/* CS0, offset 0, IO size 128K */
 
 		gpmc,sync-read;

arch/arm/boot/dts/omap3-n900.dts

···
 	onenand@0,0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
+		compatible = "ti,omap2-onenand";
 		reg = <0 0 0x20000>;	/* CS0, offset 0, IO size 128K */
 
 		gpmc,sync-read;

arch/arm/boot/dts/omap3-n950-n9.dtsi

···
 	onenand@0,0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
+		compatible = "ti,omap2-onenand";
 		reg = <0 0 0x20000>;	/* CS0, offset 0, IO size 128K */
 
 		gpmc,sync-read;

arch/arm/boot/dts/omap3430-sdp.dts

···
 		linux,mtd-name= "samsung,kfm2g16q2m-deb8";
 		#address-cells = <1>;
 		#size-cells = <1>;
+		compatible = "ti,omap2-onenand";
 		reg = <2 0 0x20000>;	/* CS2, offset 0, IO size 4 */
 
 		gpmc,device-width = <2>;