sharedconf: Fix readout of mac from fuses in FNG System
The busybox xxd command does not handle the offset correctly, so fallback to dd in the FNG System case.
Dear all, On Thursday, 4th September 2025, we will test the new disaster recovery environment. A disaster recovery test will take place between 4:00 PM and 6:00 PM CEST. Please refrain from making any changes, as they will be lost. Once testing is complete, the production environment will be restored. Thank you for your understanding.
The busybox xxd command does not handle the offset correctly, so fallback to dd in the FNG System case.