arm64: dts: mediatek: mt8192: Rename mt8192-afe-pcm to audio-controller

Device tree nodes should have generic names, and this one doesn't.
Rename the mt8192-afe-pcm subnode of audsys to `audio-controller`.

This commit brings no functional changes, but resolves dtbs_check
warnings.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: AngeloGioacchino Del Regno

arch/arm64/boot/dts/mediatek/mt8192.dtsi

@@ -973,7 +973,7 @@
 			reg = <0 0x11210000 0 0x2000>;
 			#clock-cells = <1>;
 
-			afe: mt8192-afe-pcm {
+			afe: audio-controller {
 				compatible = "mediatek,mt8192-audio";
 				interrupts = <GIC_SPI 202 IRQ_TYPE_LEVEL_HIGH 0>;
 				resets = <&watchdog 17>;