utils: eth_mac_addr: Fix the GSI/Treble compatibility am: e721f61fee am: c2703478e1 am: 788050ee75

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/2842354

Change-Id: I4cbff2e900fb72d9ef67dbf71e7aa0442c2c693a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>