jffs2reset is used to cleanup the rootfs_data overlay, but it's
currently missing in the ramfs during sysupgrade leading to the
following error:
Switching to ramdisk...
Performing system upgrade...
/lib/upgrade/do_stage2: line 27: jffs2reset: not found
Fixes: 2f1a11d0089c ("imx6: apalis: fix config survival after sysupgrade -n")
Signed-off-by: Petr Štetiar <ynezz@true.cz>