i2c-gpio: Use linux/gpio.h rather than asm/gpio.h

Direct inclusion of asm/gpio.h has been deprecated for a while now due
to the cross platform gpiolib.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

drivers/i2c/busses/i2c-gpio.c

@@ -14,8 +14,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
-
-#include <asm/gpio.h>
+#include <linux/gpio.h>
 
 /* Toggle SDA by changing the direction of the pin */
 static void i2c_gpio_setsda_dir(void *data, int state)