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/socrates_defconfig b/configs/socrates_defconfig
index f0578a5..4c55b8f 100644
--- a/configs/socrates_defconfig
+++ b/configs/socrates_defconfig
@@ -11,6 +11,7 @@
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_NAND=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set