gpio: lpc32xx: Include the right header

This is a driver so only include <linux/gpio/driver.h>.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-lpc32xx.c

@@ -20,9 +20,8 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/errno.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>