Revert "fstab: rework and tune down some flags"

This reverts commit d22da75433456b0a091f4820e615976f82613cbe.

Turns out S-ON prevents formatting devlog partition. That partition also
raises FS errors which combined with errors=panic mount flag will cause
unnecessary reboots.

Change-Id: I6c735f57f40b527e9fd04ebf796fb5e18636cfb9