MIPS: BCM47XX: remove GPIO driver

Instated of providing an own GPIO driver use the one provided by ssb and
bcma.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4592
Acked-by: Florian Fainelli <florian@openwrt.org>
diff --git a/arch/mips/bcm47xx/Kconfig b/arch/mips/bcm47xx/Kconfig
index b311be4..d7af29f 100644
--- a/arch/mips/bcm47xx/Kconfig
+++ b/arch/mips/bcm47xx/Kconfig
@@ -9,6 +9,7 @@
 	select SSB_EMBEDDED
 	select SSB_B43_PCI_BRIDGE if PCI
 	select SSB_PCICORE_HOSTMODE if PCI
+	select SSB_DRIVER_GPIO
 	default y
 	help
 	 Add support for old Broadcom BCM47xx boards with Sonics Silicon Backplane support.
@@ -23,6 +24,7 @@
 	select BCMA_DRIVER_MIPS
 	select BCMA_HOST_PCI if PCI
 	select BCMA_DRIVER_PCI_HOSTMODE if PCI
+	select BCMA_DRIVER_GPIO
 	default y
 	help
 	 Add support for new Broadcom BCM47xx boards with Broadcom specific Advanced Microcontroller Bus.