Need help with file.DTS co's I want reduce partitions & save free space on Linksys ea8500

Hello everybody,
Just compiled snapshot for Linksys ea8500 size 38,7mb. (openwrt-ipq806x-generic-linksys_ea8500-squashfs-factory.bin, sysupgrade.bin & etc.) all is fine,
but after reboot, my config files (settings) not saved, it's seems there are NO free space.
(mtd13 firmware 1st copy 40 MiB)

I love openwrt... :slight_smile: I don't need linksys firmware anymore & 2 partitions for firmware.
So I want to save free space, reduce mtd parts....
please somebody, help me to do it in a proper way..
re-map MTD partitions in DTS file.../target/linux/ipq806x/files-4.19/arch/arm/boot/dts/qcom-ipq8064-ea8500.dts
is there any important date stored on mtd17: 02080000 00020000 "syscfg" (mtd17 Linksys configuration 32.5 MiB ) ?

Hope that's will be very helpful for others ... who don't need OEM firmware anymore.
Will hope I can compile advantageous openwrt firmware with a lot of free space & one (mtd#) partition for firmware.