arm64: dts: ti: k3-am64-main: Fix ospi compatible

The TI specific compatible should be followed by the generic
"cdns,qspi-nor" compatible.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20210326130034.15231-4-p.yadav@ti.com

arch/arm64/boot/dts/ti/k3-am64-main.dtsi

@@ -592,7 +592,7 @@ fss: bus@fc00000 {
 		ranges;
 
 		ospi0: spi@fc40000 {
-			compatible = "ti,am654-ospi";
+			compatible = "ti,am654-ospi", "cdns,qspi-nor";
 			reg = <0x00 0x0fc40000 0x00 0x100>,
 			      <0x05 0x00000000 0x01 0x00000000>;
 			interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;