ARM: dts: sun8i: v3: Add RGB666 LCD PD pins definition

The V3 supports RGB666 LCD output on PD pins, which are not available
on the V3s package.

Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
Link: https://patch.msgid.link/20250701201534.815513-2-paulk@sys-base.io
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

Author: paulkocialkowski

arch/arm/boot/dts/allwinner/sun8i-v3.dtsi

@@ -56,6 +56,15 @@
 		function = "i2s";
 	};
 
+	/omit-if-no-ref/
+	lcd_rgb666_pd_pins: lcd-rgb666-pd-pins {
+		pins = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5",
+		       "PD6", "PD7", "PD8", "PD9", "PD10", "PD11",
+		       "PD12", "PD13", "PD14", "PD15", "PD16", "PD17",
+		       "PD18", "PD19", "PD20", "PD21";
+		function = "lcd";
+	};
+
 	uart1_pg_pins: uart1-pg-pins {
 		pins = "PG6", "PG7";
 		function = "uart1";