mtd: Fix dependencies for !HAS_IOMEM archs

Not every arch has io memory.
So, unbreak the build by fixing the dependencies.
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/Kconfig

@@ -74,6 +74,7 @@ config MTD_NAND_DENALI_SCRATCH_REG_ADDR
 config MTD_NAND_GPIO
 	tristate "GPIO assisted NAND Flash driver"
 	depends on GPIOLIB || COMPILE_TEST
+	depends on HAS_IOMEM
 	help
 	  This enables a NAND flash driver where control signals are
 	  connected to GPIO pins, and commands and data are communicated
@@ -463,6 +464,7 @@ config MTD_NAND_MPC5121_NFC
 config MTD_NAND_VF610_NFC
 	tristate "Support for Freescale NFC for VF610/MPC5125"
 	depends on (SOC_VF610 || COMPILE_TEST)
+	depends on HAS_IOMEM
 	help
 	  Enables support for NAND Flash Controller on some Freescale
 	  processors like the VF610, MPC5125, MCF54418 or Kinetis K70.

drivers/mtd/spi-nor/Kconfig

@@ -9,6 +9,7 @@ if MTD_SPI_NOR
 
 config MTD_MT81xx_NOR
 	tristate "Mediatek MT81xx SPI NOR flash controller"
+	depends on HAS_IOMEM
 	help
 	  This enables access to SPI NOR flash, using MT81xx SPI NOR flash
 	  controller. This controller does not support generic SPI BUS, it only