mfd: asic3 should depend on gpiolib

Now that asic3 implements the gpiolib API, it should depend on it at
build time.
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/mfd/Kconfig

@@ -17,7 +17,7 @@ config MFD_SM501
 
 config MFD_ASIC3
 	bool "Support for Compaq ASIC3"
-	depends on GENERIC_HARDIRQS && ARM
+	depends on GENERIC_HARDIRQS && HAVE_GPIO_LIB && ARM
 	 ---help---
 	  This driver supports the ASIC3 multifunction chip found on many
 	  PDAs (mainly iPAQ and HTC based ones)