Revert "BoardConfig: switch back to TWRP"

This reverts commit 8d41bc1cf246616360c520456bce3d30df2e44a9.
fstab.qcom: use F2FS for /data & /cache partitions

Change-Id: If9ab3e1a252e11c0d7de83d068e4c996a1c41a91