sparc: Add GPIO layer support.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index a214002..cb1dd35 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -20,6 +20,11 @@
 	bool
 	default y
 
+config GENERIC_GPIO
+	bool
+	help
+	  Generic GPIO API support
+
 config ARCH_NO_VIRT_TO_BUS
 	def_bool y
 
@@ -69,6 +74,7 @@
 	select HAVE_OPROFILE
 	select HAVE_ARCH_KGDB if !SMP
 	select HAVE_ARCH_TRACEHOOK
+	select ARCH_WANT_OPTIONAL_GPIOLIB
 
 # Identify this as a Sparc32 build
 config SPARC32