arm64: dts: imx8mq-librem5: add reset gpio to mantix panel description

Add the missing description for the reset gpio to the panels DT
description.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -1010,6 +1010,7 @@ lcd_panel: panel@0 {
 		vddi-supply = <&reg_lcd_1v8>;
 		backlight = <&backlight_dsi>;
 		reset-gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
+		mantix,tp-rstn-gpios = <&gpio1 24 GPIO_ACTIVE_LOW>;
 
 		port {
 			panel_in: endpoint {