gpio: remove etraxfs driver

The cris architecture is getting removed, so we no longer need the
etraxfs driver.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/gpio/gpio-etraxfs.txt

-Axis ETRAX FS General I/O controller bindings
-
-Required properties:
-
-- compatible: one of:
-  - "axis,etraxfs-gio"
-  - "axis,artpec3-gio"
-- reg: Physical base address and length of the controller's registers.
-- #gpio-cells: Should be 3
-  - The first cell is the gpio offset number.
-  - The second cell is reserved and is currently unused.
-  - The third cell is the port number (hex).
-- gpio-controller: Marks the device node as a GPIO controller.
-
-Example:
-
-	gio: gpio@b001a000 {
-		compatible = "axis,etraxfs-gio";
-		reg = <0xb001a000 0x1000>;
-		gpio-controller;
-		#gpio-cells = <3>;
-	};

drivers/gpio/Kconfig

@@ -170,15 +170,6 @@ config GPIO_EP93XX
 	depends on ARCH_EP93XX
 	select GPIO_GENERIC
 
-config GPIO_ETRAXFS
-	bool "Axis ETRAX FS General I/O"
-	depends on CRIS || COMPILE_TEST
-	depends on OF_GPIO
-	select GPIO_GENERIC
-	select GPIOLIB_IRQCHIP
-	help
-	  Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
-
 config GPIO_EXAR
 	tristate "Support for GPIO pins on XR17V352/354/358"
 	depends on SERIAL_8250_EXAR

drivers/gpio/Makefile

@@ -46,7 +46,6 @@ obj-$(CONFIG_GPIO_DLN2)		+= gpio-dln2.o
 obj-$(CONFIG_GPIO_DWAPB)	+= gpio-dwapb.o
 obj-$(CONFIG_GPIO_EM)		+= gpio-em.o
 obj-$(CONFIG_GPIO_EP93XX)	+= gpio-ep93xx.o
-obj-$(CONFIG_GPIO_ETRAXFS)	+= gpio-etraxfs.o
 obj-$(CONFIG_GPIO_EXAR)		+= gpio-exar.o
 obj-$(CONFIG_GPIO_F7188X)	+= gpio-f7188x.o
 obj-$(CONFIG_GPIO_FTGPIO010)	+= gpio-ftgpio010.o