spi: spi-txx9: Remove redundant platform_set_drvdata()

Setting platform data to NULL is not necessary.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-txx9.c

@@ -425,7 +425,6 @@ exit:
 		clk_disable(c->clk);
 		clk_put(c->clk);
 	}
-	platform_set_drvdata(dev, NULL);
 	spi_master_put(master);
 	return ret;
 }
@@ -436,7 +435,6 @@ static int txx9spi_remove(struct platform_device *dev)
 	struct txx9spi *c = spi_master_get_devdata(master);
 
 	spi_unregister_master(master);
-	platform_set_drvdata(dev, NULL);
 	destroy_workqueue(c->workqueue);
 	clk_disable(c->clk);
 	clk_put(c->clk);