gpio: lp3943: 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-lp3943.c

@@ -12,7 +12,7 @@
 
 #include <linux/bitops.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/mfd/lp3943.h>
 #include <linux/module.h>