The commit ed3a97f7b2 ("rockchip-wic.inc: don't let wic edit fstab")
removing this ability was introduced to fix an issue in the wic tool in
OE-Core in which wic partitions whose "mountpoint" is not a valid path
are still added to fstab.
This was eventually fixed in OE-Core in commit 7aa678ce804c
("wic:direct.py: ignore invalid mountpoints during fstab update") which
is part of release Honister (3.4) and later.
Therefore, it should be safe to now let wic update fstab again for
partitions with a valid mountpoint path. The benefit being that the wic
partitions with a mountpoint are now automounted at boot.
Cc: Quentin Schulz <foss+yocto@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>