ARM: Kirkwood: Make use of mvebu pincltl and gpio drivers

Select the generic mvebu kirkwood pincltr driver and generic mvebu
gpio driver. This requires minor changes to the DT, and the calls to
configure plat-orion gpio driver are removed.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Michael Walle <michael@walle.cc>
Tested-by: Simon Baatz <gmbnomis@gmail.com>
Tested-by: Jamie Lentin <jm@lentin.co.uk>
Tested-by: Joshua Coombs <josh.coombs@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ca2b418..3cf5742 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -549,6 +549,8 @@
 	select CPU_FEROCEON
 	select GENERIC_CLOCKEVENTS
 	select PCI
+	select PINCTRL
+	select PINCTRL_KIRKWOOD
 	select PLAT_ORION_LEGACY
 	help
 	  Support for the following Marvell Kirkwood series SoCs: