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/P5020DS_SDCARD_defconfig b/configs/P5020DS_SDCARD_defconfig
index d025b0e..2586891 100644
--- a/configs/P5020DS_SDCARD_defconfig
+++ b/configs/P5020DS_SDCARD_defconfig
@@ -12,6 +12,7 @@
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_NAND=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y