mtd: Enable Open Firmware initialisation of MTD devices and maps for MicroBlaze

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 7a58bd5..5b82cd9 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -74,7 +74,7 @@
 
 config MTD_PHYSMAP_OF
 	tristate "Flash device in physical memory map based on OF description"
-	depends on PPC_OF && (MTD_CFI || MTD_JEDECPROBE || MTD_ROM)
+	depends on (MICROBLAZE || PPC_OF) && (MTD_CFI || MTD_JEDECPROBE || MTD_ROM)
 	help
 	  This provides a 'mapping' driver which allows the NOR Flash and
 	  ROM driver code to communicate with chips which are mapped