mtd/maps: gpio-addr-flash: depend on GPIO arch support

The driver requires gpio functionality, so make sure we depend on that in
the Kconfig menu.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/Kconfig

@@ -486,6 +486,7 @@ config MTD_BFIN_ASYNC
 
 config MTD_GPIO_ADDR
 	tristate "GPIO-assisted Flash Chip Support"
+	depends on GENERIC_GPIO || GPIOLIB
 	depends on MTD_COMPLEX_MAPPINGS
 	select MTD_PARTITIONS
 	help