jffs2/mtdblock overlays are long time gone, and as we switch to the new
f2fs/ext4 based overlays, we need to add missing support for loop block
device and f2fs to kernel.
Signed-off-by: Petr Štetiar <ynezz@true.cz>
It's just copy of 4.14 and will be refreshed in the upcoming commit,
renamed config-default to config-4.14 as well.
Signed-off-by: Petr Štetiar <ynezz@true.cz>