arm64: dts: apple: j[34]1[46]: Mark ps_atc3_common as always-on

This works around missing (or incomplete) suspend/resume handling in
atc/dcp for the the HDMI output on 14 and 16-inch Macbook Pros.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi

@@ -135,6 +135,10 @@
 	status = "okay";
 };
 
+&ps_atc3_common {
+	apple,always-on; /* Needs to stay on for HDMI resume */
+};
+
 /* USB Type C */
 &i2c0 {
 	hpm0: usb-pd@38 {