gpio-lynxpoint: Add X86 dependency and io-port handling header.

Lynxpoint gpio driver uses X86 specific io-ports to control gpios

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 93aaadf..704d01d 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -303,7 +303,7 @@
 
 config GPIO_LYNXPOINT
 	bool "Intel Lynxpoint GPIO support"
-	depends on ACPI
+	depends on ACPI && X86
 	select IRQ_DOMAIN
 	help
 	  driver for GPIO functionality on Intel Lynxpoint PCH chipset