This option is enabled by default for U-Boot.
+config DISTRO_DEFAULTS
+ bool "Select defaults suitable for booting general purpose Linux distributions"
+ default y if ARCH_SUNXI
+ default n
+ select CMD_BOOTZ
+ select CMD_DHCP
+ select CMD_EXT2
+ select CMD_EXT4
+ select CMD_FAT
+ select CMD_FS_GENERIC
+ select CMD_MII
+ select CMD_PING
+ select HUSH_PARSER
+ help
+ Select this to enable various options and commands which are suitable
+ for building u-boot for booting general purpose Linux distributions.
+
config SYS_MALLOC_F
bool "Enable malloc() pool before relocation"
default y if DM