gpio: ath79: Allow building in compile tests

To allow building the driver in compile tests we must drop the
dependency on asm/mach-ath79/ar71xx_regs.h. For this we replace the
include with local definition of the registers needed for this driver.
Signed-off-by: NAlban Bedel <albeu@free.fr>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/Kconfig

@@ -129,7 +129,7 @@ config GPIO_AMDPT
 config GPIO_ATH79
 	tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
 	default y if ATH79
-	depends on ATH79
+	depends on ATH79 || COMPILE_TEST
 	select GPIO_GENERIC
 	help
 	  Select this option to enable GPIO driver for

drivers/gpio/gpio-ath79.c

@@ -16,7 +16,10 @@
 #include <linux/platform_data/gpio-ath79.h>
 #include <linux/of_device.h>
 
-#include <asm/mach-ath79/ar71xx_regs.h>
+#define AR71XX_GPIO_REG_OE		0x00
+#define AR71XX_GPIO_REG_IN		0x04
+#define AR71XX_GPIO_REG_SET		0x0c
+#define AR71XX_GPIO_REG_CLEAR		0x10
 
 struct ath79_gpio_ctrl {
 	struct gpio_chip gc;