gpio: zevio: Use proper headers and drop OF_GPIO dependency

The driver doesn't depend on the OF_GPIO to be compiled. Hence
the proper header to use is mod_devicetable.h. Replace of*.h with
the above mentioned and drop redundant dependency.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/Kconfig

@@ -762,7 +762,7 @@ config GPIO_XTENSA
 
 config GPIO_ZEVIO
 	bool "LSI ZEVIO SoC memory mapped GPIOs"
-	depends on ARM && OF_GPIO
+	depends on ARM
 	help
 	  Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
 

drivers/gpio/gpio-zevio.c

@@ -5,13 +5,14 @@
  * Author: Fabian Vogt <fabian@ritter-vogt.de>
  */
 
-#include <linux/spinlock.h>
+#include <linux/bitops.h>
 #include <linux/errno.h>
 #include <linux/init.h>
-#include <linux/bitops.h>
 #include <linux/io.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/slab.h>
+#include <linux/spinlock.h>
+
 #include <linux/gpio/driver.h>
 
 /*