case "$board" in
zyxel,nbg6817)
local dualflagmtd="$(find_mtd_part 0:dual_flag)"
- # XXX: drop upper case after kernel v5.4 is gone (qcom-smem)
- [ -b $dualflagmtd ] || \
- dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
[ -b $dualflagmtd ] || return 1
case "$rootfs" in