arm64: dts: uniphier: add headphone detect gpio for LD20 global board

This patch adds GPIO for headphone detection on LD20 global board.
Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm64/boot/dts/socionext/uniphier-ld20-global.dts

@@ -60,6 +60,7 @@ &i2s_port3
 			&i2s_port4
 			&spdif_port0
 			&comp_spdif_port0>;
+		hp-det-gpio = <&gpio UNIPHIER_GPIO_IRQ(0) GPIO_ACTIVE_LOW>;
 	};
 
 	spdif-out {