spi: bcm2835: bcm2835_spi_transfer_one_poll remove unnecessary argument

Remove the unnecessary argument of xfer_time_us when calling
bcm2835_spi_transfer_one_poll.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>

Changelog:
  V1 -> V2: applied feedback by Stefan Wahren
            reorganized patchset
	    added extra rational, descriptions
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm2835.c

@@ -697,8 +697,7 @@ static void bcm2835_dma_init(struct spi_master *master, struct device *dev)
 static int bcm2835_spi_transfer_one_poll(struct spi_master *master,
 					 struct spi_device *spi,
 					 struct spi_transfer *tfr,
-					 u32 cs,
-					 unsigned long long xfer_time_us)
+					 u32 cs)
 {
 	struct bcm2835_spi *bs = spi_master_get_devdata(master);
 	unsigned long timeout;
@@ -799,8 +798,7 @@ static int bcm2835_spi_transfer_one(struct spi_master *master,
 
 	/* for short requests run polling*/
 	if (xfer_time_us <= BCM2835_SPI_POLLING_LIMIT_US)
-		return bcm2835_spi_transfer_one_poll(master, spi, tfr,
-						     cs, xfer_time_us);
+		return bcm2835_spi_transfer_one_poll(master, spi, tfr, cs);
 
 	/* run in dma mode if conditions are right */
 	if (master->can_dma && bcm2835_spi_can_dma(master, spi, tfr))