ARM: keystone: Enable PINCTRL config

Some Keystone 2 devices utilize pinmuxing which requires PINCTRL
to be enabled. Therefore, enable PINCTRL for all Keystone 2 devices.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>

arch/arm/mach-keystone/Kconfig

@@ -11,6 +11,7 @@ config ARCH_KEYSTONE
 	select ZONE_DMA if ARM_LPAE
 	select MIGHT_HAVE_PCI
 	select PCI_DOMAINS if PCI
+	select PINCTRL
 	help
 	  Support for boards based on the Texas Instruments Keystone family of
 	  SoCs.