bpf_map_def.h - fix no longer correct comment am: fd59a4a0a6

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1619222

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ifdef2d29e0d5ddebd5f7d1a68c4d2d8b64600239