configs: Migrate CMD_NAND*

Migrate all remaining instances of CMD_NAND, CMD_NAND_TRIMFFS
CMD_NAND_LOCK_UNLOCK and CMD_NAND_TORTURE from the headers into the
defconfig files.

Tested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/flea3_defconfig b/configs/flea3_defconfig
index 75a97e3..ae7f6a4 100644
--- a/configs/flea3_defconfig
+++ b/configs/flea3_defconfig
@@ -8,6 +8,7 @@
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="flea3 U-Boot > "
+CONFIG_CMD_NAND=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set