arm64: dts: imx8mq-librem5-r4: add the correct panel

The r4 ("Evergreen") hardware revision of the Librem 5 phone includes a
slightly different panel than the revisions before it. Since its'
description is available, describe it properly for the board.
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-librem5-r4.dts

@@ -18,6 +18,10 @@ &led_backlight {
 	led-max-microamp = <25000>;
 };
 
+&lcd_panel {
+	compatible = "ys,ys57pss36bh5gq";
+};
+
 &proximity {
 	proximity-near-level = <10>;
 };