dw_dmac: don't call platform_get_drvdata twice

There is no need to call platform_get_drvdata twice as we have it already in dw
variable.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

drivers/dma/dw_dmac.c

@@ -1787,7 +1787,7 @@ static void dw_shutdown(struct platform_device *pdev)
 {
 	struct dw_dma	*dw = platform_get_drvdata(pdev);
 
-	dw_dma_off(platform_get_drvdata(pdev));
+	dw_dma_off(dw);
 	clk_disable_unprepare(dw->clk);
 }
 
@@ -1796,7 +1796,7 @@ static int dw_suspend_noirq(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dw_dma	*dw = platform_get_drvdata(pdev);
 
-	dw_dma_off(platform_get_drvdata(pdev));
+	dw_dma_off(dw);
 	clk_disable_unprepare(dw->clk);
 
 	return 0;