disk: support MTD partitions

Add new MTD partition driver, which can be useful with
mtdblock driver combination.

Signed-off-by: Alexey Romanov <avromanov@salutedevices.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 4fdc964..e4e29e0 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -2,6 +2,7 @@
 
 config MTD_PARTITIONS
 	bool
+	select PARTITIONS
 
 config MTD
 	bool "Enable MTD layer"