Integrate meta-guf-distro/fix-imx6-postinst

Commit: https://gitlab.com/garz-fricke/yocto/layers/meta-guf-distro/-/commit/4e7ca1ec009c05ef3f70d60248574212a21ee33f

fngpostinstall: Skip generation of touchcalibration for devices without touch

The generation of the udev rule fails if neither touch nor framebuffer nor pointercal is available. The image installation should still work, so this patch skips the udev rule generation in theses cases.

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Commit: https://gitlab.com/garz-fricke/yocto/layers/meta-guf-distro/-/commit/2045bb9424840f9d5bf0fc076e3b0d81b24d7793

gf-prepare-kernel: Add argument parser to ignore optional args

fng-postinstallation passes an parameter to detect the script is running as a postinstall step. This arg currently needs to be ignored.