Input: goodix - change goodix_i2c_write() len parameter type to int

Change the type of the goodix_i2c_write() len parameter to from 'unsigned'
to 'int' to avoid bare use of 'unsigned', changing it to 'int' makes
goodix_i2c_write()' prototype consistent with goodix_i2c_read().

Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210920150643.155872-2-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/goodix.c

@@ -290,7 +290,7 @@ static int goodix_i2c_read(struct i2c_client *client,
  * @len: length of the buffer to write
  */
 static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf,
-			    unsigned len)
+			    int len)
 {
 	u8 *addr_buf;
 	struct i2c_msg msg;