mfd: Change rdc321x resources flags to IORESOURCE_IO

The rdc321x southbridge PCI device has no MEM PCI resources that we could
pass to mfd_add_devices. Since 33254dd5, mfd_add_device checks for the
mem_base argument that we set to NULL. Changing the resources passed to
our MFD cells from IORESOURCE_MEM to IORESOURCE_IO fixes that. Since we use
those resources as offsets to the PCI configuration space base address of
the southbridge device this is also more adequate.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/watchdog/rdc321x_wdt.c b/drivers/watchdog/rdc321x_wdt.c
index 4733a99..428f8a1 100644
--- a/drivers/watchdog/rdc321x_wdt.c
+++ b/drivers/watchdog/rdc321x_wdt.c
@@ -237,7 +237,7 @@
 		return -ENODEV;
 	}
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wdt-reg");
+	r = platform_get_resource_byname(pdev, IORESOURCE_IO, "wdt-reg");
 	if (!r) {
 		dev_err(&pdev->dev, "failed to get wdt-reg resource\n");
 		return -ENODEV;