[POWERPC] pasemi: Kconfig for gpio_mdio

arch/powerpc/platforms/pasemi/gpio_mdio.c really depends on CONFIG_PHYLIB.
Add a config option for it, allow for it to be disabled if needed and fix
the dependency.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/pasemi/Kconfig

@@ -19,4 +19,11 @@ config PPC_PASEMI_IOMMU
 	help
 	  IOMMU support for PA6T-1682M
 
+config PPC_PASEMI_MDIO
+	depends on PHYLIB
+	tristate "MDIO support via GPIO"
+	default y
+	help
+	  Driver for MDIO via GPIO on PWRficient platforms
+
 endmenu

arch/powerpc/platforms/pasemi/Makefile

-obj-y	+= setup.o pci.o time.o idle.o powersave.o iommu.o gpio_mdio.o
-
+obj-y	+= setup.o pci.o time.o idle.o powersave.o iommu.o
+obj-$(CONFIG_PPC_PASEMI_MDIO)	+= gpio_mdio.o