Convert CONFIG_CMD_MTDPARTS_SPREAD to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_MTDPARTS_SPREAD

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[trini: Make this a bool not a string]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 67890c7..4d89af4 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1230,6 +1230,16 @@
 	  Defines a default MTD partitioning scheme in the Linux MTD command
 	  line partitions format
 
+config CMD_MTDPARTS_SPREAD
+	bool "Padd partition size to take account of bad blocks"
+	depends on CMD_MTDPARTS
+	help
+	  This enables the 'spread' sub-command of the mtdparts command.
+	  This command will modify the existing mtdparts variable by increasing
+	  the size of the partitions such that 1) each partition's net size is
+	  at least as large as the size specified in the mtdparts variable and
+	  2) each partition starts on a good block.
+
 endmenu
 
 menu "Debug commands"
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index fd0b952..698ced0 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -61,6 +61,7 @@
 CONFIG_CMD_CBFS=y
 CONFIG_CMD_CRAMFS=y
 CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_MTDPARTS=y
 CONFIG_MAC_PARTITION=y
 CONFIG_AMIGA_PARTITION=y
 CONFIG_OF_CONTROL=y
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 4a2730a..90ed096 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -293,7 +293,6 @@
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_MTDPARTS_SPREAD
 CONFIG_CMD_ONENAND
 CONFIG_CMD_PCA953X
 CONFIG_CMD_PCA953X_INFO