Integrate meta-guf-distro/rewrite-network-setup-for-lan95xx

Commit: https://gitlab.com/garz-fricke/yocto/layers/meta-guf-distro/-/commit/ee496a9ce75f01cc217e4e074ebf5267d4fa5990

sharedconf:network: Rewrite scripts for lan95xx to less external deps.

Replace xxd with an echo command, as current busybox xxd does not support -r. Also reuse some shared functions from gf-functions.

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Commit: https://gitlab.com/garz-fricke/yocto/layers/meta-guf-distro/-/commit/69c755c50c5afbfc2dea4705ca48012b79648ee4

sharedconf:network: Move configure scripts for lan95xx to sharedconf package

The scripts are used to setup the network chips' eeprom and used similar to other network setup scripts living in shared conf. They also may share some functionality, so I moved them to the same package.