gpio: ge: Drop of_gpio.h include

This driver does not make use of the functions in
<linux/of_gpio.h> so drop this include.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-ge.c

@@ -21,7 +21,6 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <linux/of_address.h>
 #include <linux/module.h>
 #include <linux/gpio/driver.h>