Integrate meta-guf-distro/add_mmc_process_check

Commit: https://gitlab.com/garz-fricke/yocto/layers/meta-guf-distro/-/commit/2f40811cb57874b068e8d403ed284c2d83929025

fnginstall Wait for MMC processes to complete before formatting

Now the install process waits for all processes using the mmc to complete before performing the formatting steps. This is required because otherwise the partition table gets broken sometimes and the last three partitions are missing. Detected on trizeps mini (imx8mm)

BCS 746-000543