spi: pic32: 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.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240430114142.28551-6-wsa+renesas@sang-engineering.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pic32.c

@@ -498,7 +498,7 @@ static int pic32_spi_one_transfer(struct spi_controller *host,
 {
 	struct pic32_spi *pic32s;
 	bool dma_issued = false;
-	unsigned long timeout;
+	unsigned long time_left;
 	int ret;
 
 	pic32s = spi_controller_get_devdata(host);
@@ -545,8 +545,8 @@ static int pic32_spi_one_transfer(struct spi_controller *host,
 	}
 
 	/* wait for completion */
-	timeout = wait_for_completion_timeout(&pic32s->xfer_done, 2 * HZ);
-	if (timeout == 0) {
+	time_left = wait_for_completion_timeout(&pic32s->xfer_done, 2 * HZ);
+	if (time_left == 0) {
 		dev_err(&spi->dev, "wait error/timedout\n");
 		if (dma_issued) {
 			dmaengine_terminate_all(host->dma_rx);