cmd: mtd: add 'mtd' command

There should not be a 'nand' command, a 'sf' command and certainly not
a new 'spi-nand' command. Write a 'mtd' command instead to manage all
MTD devices/partitions at once. This should be the preferred way to
access any MTD device.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 13d4c99..c9be859 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -864,6 +864,12 @@
 	  Enable support for the "mmc swrite" command to write Android sparse
 	  images to eMMC.
 
+config CMD_MTD
+	bool "mtd"
+	select MTD_PARTITIONS
+	help
+	  MTD commands support.
+
 config CMD_NAND
 	bool "nand"
 	default y if NAND_SUNXI
@@ -1697,14 +1703,14 @@
 
 config MTDIDS_DEFAULT
 	string "Default MTD IDs"
-	depends on CMD_MTDPARTS || CMD_NAND || CMD_FLASH
+	depends on CMD_MTD || CMD_MTDPARTS || CMD_NAND || CMD_FLASH
 	help
 	  Defines a default MTD IDs list for use with MTD partitions in the
 	  Linux MTD command line partitions format.
 
 config MTDPARTS_DEFAULT
 	string "Default MTD partition scheme"
-	depends on CMD_MTDPARTS || CMD_NAND || CMD_FLASH
+	depends on CMD_MTD || CMD_MTDPARTS || CMD_NAND || CMD_FLASH
 	help
 	  Defines a default MTD partitioning scheme in the Linux MTD command
 	  line partitions format