arm64: dts: imx8-ss-audio: add fallback compatible string fsl,imx6ull-esai for esai

The ESAI of i.MX8QM is the same as i.MX6ULL. So add fsl,imx6ull-esai for
esai.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Fixes: adf7ea4 ("ASoC: dt-bindings: fsl-esai: allow fsl,imx8qm-esai fallback to fsl,imx6ull-esai")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: nxpfrankli

arch/arm64/boot/dts/freescale/imx8-ss-audio.dtsi

@@ -165,7 +165,7 @@ audio_subsys: bus@59000000 {
 	};
 
 	esai0: esai@59010000 {
-		compatible = "fsl,imx8qm-esai";
+		compatible = "fsl,imx8qm-esai", "fsl,imx6ull-esai";
 		reg = <0x59010000 0x10000>;
 		interrupts = <GIC_SPI 409 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&esai0_lpcg IMX_LPCG_CLK_4>,

arch/arm64/boot/dts/freescale/imx8qm-ss-audio.dtsi

@@ -134,7 +134,7 @@
 	};
 
 	esai1: esai@59810000 {
-		compatible = "fsl,imx8qm-esai";
+		compatible = "fsl,imx8qm-esai", "fsl,imx6ull-esai";
 		reg = <0x59810000 0x10000>;
 		interrupts = <GIC_SPI 411 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&esai1_lpcg IMX_LPCG_CLK_0>,