Convert CONFIG_CMD_REISER to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_REISER

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>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 2caa0b4..d623a43 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1275,6 +1275,15 @@
 	  at least as large as the size specified in the mtdparts variable and
 	  2) each partition starts on a good block.
 
+config CMD_REISER
+	bool "reiser - Access to reiserfs filesystems"
+	help
+	  This provides two commands which operate on a resierfs filesystem,
+	  commonly used some years ago:
+
+	    reiserls - list files
+	    reiserload - load a file
+
 endmenu
 
 menu "Debug commands"
diff --git a/configs/ethernut5_defconfig b/configs/ethernut5_defconfig
index b9010d6..26df916 100644
--- a/configs/ethernut5_defconfig
+++ b/configs/ethernut5_defconfig
@@ -33,6 +33,7 @@
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_JFFS2=y
+CONFIG_CMD_REISER=y
 CONFIG_CMD_UBI=y
 CONFIG_OF_CONTROL=y
 CONFIG_DM=y
diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h
index cb0ab6d..00bc6fc 100644
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -13,7 +13,6 @@
  * Alphabetical list of all possible commands.
  */
 
-#define CONFIG_CMD_REISER	/* Reiserfs support		*/
 #define CONFIG_CMD_SANDBOX	/* sb command to access sandbox features */
 #define CONFIG_CMD_SAVES	/* save S record dump		*/
 #define CONFIG_CMD_SDRAM	/* SDRAM DIMM SPD info printout */
diff --git a/include/configs/ethernut5.h b/include/configs/ethernut5.h
index 756b1d6..5aa091b 100644
--- a/include/configs/ethernut5.h
+++ b/include/configs/ethernut5.h
@@ -61,7 +61,6 @@
 #define CONFIG_ENV_SPI_MAX_HZ	15000000
 
 #ifndef MINIMAL_LOADER
-#define CONFIG_CMD_REISER
 #define CONFIG_CMD_SAVES
 #endif
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 888af42..5bc16fb 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_REISER
 CONFIG_CMD_SANDBOX
 CONFIG_CMD_SAVES
 CONFIG_CMD_SCSI