gpio: add HAS_IOPORT dependencies

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. We thus need to add HAS_IOPORT as dependency for
those drivers using them.
Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/Kconfig

@@ -704,18 +704,6 @@ config GPIO_VISCONTI
 	help
 	  Say yes here to support GPIO on Tohisba Visconti.
 
-config GPIO_VX855
-	tristate "VIA VX855/VX875 GPIO"
-	depends on (X86 || COMPILE_TEST) && PCI
-	select MFD_CORE
-	select MFD_VX855
-	help
-	  Support access to the VX855/VX875 GPIO lines through the GPIO library.
-
-	  This driver provides common support for accessing the device.
-	  Additional drivers must be enabled in order to use the
-	  functionality of the device.
-
 config GPIO_WCD934X
 	tristate "Qualcomm Technologies Inc WCD9340/WCD9341 GPIO controller driver"
 	depends on MFD_WCD934X && OF_GPIO
@@ -835,7 +823,19 @@ config GPIO_IDT3243X
 endmenu
 
 menu "Port-mapped I/O GPIO drivers"
-	depends on X86 # Unconditional I/O space access
+	depends on X86 && HAS_IOPORT # I/O space access
+
+config GPIO_VX855
+	tristate "VIA VX855/VX875 GPIO"
+	depends on PCI
+	select MFD_CORE
+	select MFD_VX855
+	help
+	  Support access to the VX855/VX875 GPIO lines through the GPIO library.
+
+	  This driver provides common support for accessing the device.
+	  Additional drivers must be enabled in order to use the
+	  functionality of the device.
 
 config GPIO_I8255
 	tristate