i2c: qcom-geni: use 'time_left' variable with wait_for_completion_timeout()

There is a confusing pattern in the kernel to use a variable named 'timeout' to
store the result of wait_for_completion_timeout() causing patterns like:

	timeout = wait_for_completion_timeout(...)
	if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the code
self explaining.

Fix to the proper variable type 'unsigned long' while here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

Author: Wolfram Sang

drivers/i2c/busses/i2c-qcom-geni.c

@@ -586,7 +586,8 @@ static int geni_i2c_gpi_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], i
 {
 	struct dma_slave_config config = {};
 	struct gpi_i2c_config peripheral = {};
-	int i, ret = 0, timeout;
+	int i, ret = 0;
+	unsigned long time_left;
 	dma_addr_t tx_addr, rx_addr;
 	void *tx_buf = NULL, *rx_buf = NULL;
 	const struct geni_i2c_clk_fld *itr = gi2c->clk_fld;
@@ -629,8 +630,8 @@ static int geni_i2c_gpi_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], i
 
 		dma_async_issue_pending(gi2c->tx_c);
 
-		timeout = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
-		if (!timeout)
+		time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
+		if (!time_left)
 			gi2c->err = -ETIMEDOUT;
 
 		if (gi2c->err) {