Integrate u-boot-seco-mtk/oleksii/fix-boot-counter

Commit: https://git.seco.com/edgehog/bsp/mediatek/u-boot-seco-mtk/-/commit/dfc9fe93e01c1d3cb408d5837d61431b90674931

[SYSDATA] Add Switchslot system for bootembedded

MediaTek uses 'bootembedded' rather than 'booti' or 'bootz'