sepolicy: Fix rmtfs sysfs path for v5.18+ kernel versions am: 8c86e37636

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/2046643

Change-Id: I364ae38d65c7b7a91a882f3de923dde9a56343db
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>