[IA64] gpio: GENERIC_GPIO default must be n

Since GPIOLIB is optional on ia64, GENERIC_GPIO must not be selected by
default.  If GPIOLIB is enabled, it will select GENERIC_GPIO.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 1248547..aaaee50 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -92,7 +92,7 @@
 	def_bool y
 
 config GENERIC_GPIO
-	def_bool y
+	bool
 
 config DMI
 	bool