ARM: socfpga: Add syscon to be part of socfpga

SOCFPGA has a system manager register block can be accessed by using
the syscon driver.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Cc: Pavel Machek <pavel@denx.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: <linux@arm.linux.org.uk>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/mach-socfpga/Kconfig b/arch/arm/mach-socfpga/Kconfig
index 566e804..07dff6f 100644
--- a/arch/arm/mach-socfpga/Kconfig
+++ b/arch/arm/mach-socfpga/Kconfig
@@ -13,5 +13,6 @@
 	select GPIO_PL061 if GPIOLIB
 	select HAVE_ARM_SCU
 	select HAVE_SMP
+	select MFD_SYSCON
 	select SPARSE_IRQ
 	select USE_OF