ASoC: ti: davinci-mcasp: Use &pdev->dev for early dev_warn

At this point mcasp->dev is not initialized and we would have NULL pointer
dereference if we would have failed to get the mem memory resource by
name.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201008085400.19944-1-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Peter Ujfalusi

sound/soc/ti/davinci-mcasp.c

@@ -2155,7 +2155,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
 
 	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
 	if (!mem) {
-		dev_warn(mcasp->dev,
+		dev_warn(&pdev->dev,
 			 "\"mpu\" mem resource not found, using index 0\n");
 		mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 		if (!mem) {