spi: tegra: do not use clock name to get clock

Since Tegra spi devices do not have multiple clocks, no need to use
clock name to get the clock.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 02feaa5..e5dce91 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -525,7 +525,7 @@
 		goto exit_free_master;
 	}
 
-	tsd->clk = devm_clk_get(&pdev->dev, "spi");
+	tsd->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(tsd->clk)) {
 		dev_err(&pdev->dev, "can not get clock\n");
 		ret = PTR_ERR(tsd->clk);