i2c: i2c-bcm2835: match return type of wait_for_completion_timeout

return type of wait_for_completion_timeout is unsigned long not int. as
time_left is used for wait_for_completion_timeout exclusively here its
type is simply changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-bcm2835.c

@@ -147,7 +147,7 @@ static int bcm2835_i2c_xfer_msg(struct bcm2835_i2c_dev *i2c_dev,
 				struct i2c_msg *msg)
 {
 	u32 c;
-	int time_left;
+	unsigned long time_left;
 
 	i2c_dev->msg_buf = msg->buf;
 	i2c_dev->msg_buf_remaining = msg->len;