[automerger skipped] mm: allow access fastrpc total_dma_kb sysfs am: f9529992d6 -s ours am: c07026b447 -s ours

am skip reason: Change-Id I8a548fa667072f188b86d101b874a7cf8c9d5d79 with SHA-1 52299584f2 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/pixel-sepolicy/+/12662148

Change-Id: Id2f93219067d22c6259fa0465da2a69881304d76