dragonboards: fstab: Mount /data as F2FS partition am: 6d08753ba8 am: f494791086

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/3013674

Change-Id: Iebaa50426a29ba6068ad2272cc5bce77989abcda
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>