uboot/configs/bananapi_m2_zero_defconfig
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   1CONFIG_ARM=y
   2CONFIG_ARCH_SUNXI=y
   3CONFIG_SPL=y
   4CONFIG_MACH_SUN8I_H3=y
   5CONFIG_DRAM_CLK=408
   6CONFIG_MMC0_CD_PIN=""
   7CONFIG_DEFAULT_DEVICE_TREE="sun8i-h2-plus-bananapi-m2-zero"
   8# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
   9