ARM: dts: nanopc-t6: fix RT5616 headphone jack DAPM pin mismatch (armbian#388)

The simple-audio-card hp-pin-name was referencing "Headphone Jack"
but the actual widget is defined as "Headphones", causing ALSA
to report "ASoC: DAPM unknown pin Headphone Jack" error.

Author: SuperKali

arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dts

@@ -54,7 +54,7 @@
 		simple-audio-card,mclk-fs = <256>;
 
 		simple-audio-card,hp-det-gpio = <&gpio1 RK_PC4 GPIO_ACTIVE_LOW>;
-		simple-audio-card,hp-pin-name = "Headphone Jack";
+		simple-audio-card,hp-pin-name = "Headphones";
 
 		simple-audio-card,widgets =
 			"Headphone", "Headphones",