You can build the cl-som-imx7_defconfig target, which is a mx7 board with SPL support.
The resultant binaries are SPL and u-boot.img and they can be flashed directly into the SD card/eMMC.
Thank you your comment , i am using u-boot.imx for sd card but i need write to nand this image , our old card prepared for spl and u-boot.img Can i prepare for u-boot.imx ? Hardware , mtd nand is ready and i did not want use to mfgtools actually i hate this and not export usb port our custom card . Which way i should try ? i did not any example mtd0 mtd1 nand and u-boot.imx