Portenta-X8 MACHINE: add custom wks file

Author: MaxPayne86

meta-arduino-bsp/conf/machine/portenta-x8.conf

@@ -58,5 +58,8 @@ CORE_IMAGE_BASE_INSTALL:remove:portenta-x8 = " \
 
 KERNEL_MODULE_AUTOLOAD:portenta-x8:append = "anx7625 i2c-dev spidev"
 
+# Custom wks file
+WKS_FILE:mx8mp-nxp-bsp = "imx-imx-boot-singlepart.wks.in"
+
 # @TODO: below seems to be ignored
 SERIAL_CONSOLES = "115200;ttymxc2"