Overlay: Update Allo Piano Plus dac driver for 5.4.y kernels.

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Create unique names for the two instances of the codec driver.
Signed-off-by: NPaul Hermann <paul@picoreplayer.org>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/boot/dts/overlays/allo-piano-dac-plus-pcm512x-audio-overlay.dts

@@ -23,12 +23,14 @@
 				#sound-dai-cells = <0>;
 				compatible = "ti,pcm5122";
 				reg = <0x4c>;
+				sound-name-prefix = "Main";
 				status = "okay";
 			};
 			allo_pcm5122_4d: pcm5122@4d {
 				#sound-dai-cells = <0>;
 				compatible = "ti,pcm5122";
 				reg = <0x4d>;
+				sound-name-prefix = "Sub";
 				status = "okay";
 			};
 		};