arm64: dts: imx8-apalis-v1.1: Remove invalid GPIO properties

Per fsl-imx-gpio.yaml, 'pad-wakeup' and 'pad-wakeup-num' are not
valid properties/

Remove them to fix the following schema warning:

imx8qm-apalis-ixora-v1.1.dtb: gpio@5d0a0000: 'pad-wakeup', 'pad-wakeup-num' do not match any of the regexes: '^(hog-[0-9]+|.+-hog(-[0-9]+)?)$', 'pinctrl-[0-9]+'
	from schema $id: http://devicetree.org/schemas/gpio/fsl-imx-gpio.yaml#Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi

@@ -503,15 +503,6 @@ &lsio_gpio2 {
 			  "MXM3_185",
 			  "MXM3_187";
 
-	/*
-	 * Add GPIO2_20 as a wakeup source:
-	 * Pin:  101	SC_P_SPI3_CS0 (MXM3_37/WAKE1_MICO)
-	 * Type: 5	SC_PAD_WAKEUP_FALL_EDGE
-	 * Line: 20
-	 */
-	pad-wakeup = <IMX8QM_SPI3_CS0 5 20>;
-	pad-wakeup-num = <1>;
-
 	pcie-wifi-hog {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_pcie_wifi_refclk>;