ASoC: omap: simplify platform_get_resource_byname/devm_ioremap_resource

Remove unneeded error handling on the result of a call to
platform_get_resource_byname when the value is passed to devm_ioremap_resource.

In the case of omap-dmic.c, the error-handling code of
devm_ioremap_resource is also corrected to include releasing the clock.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression pdev,res,e,e1;
expression ret != 0;
identifier l;
@@

  res = platform_get_resource_byname(...);
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  e = devm_ioremap_resource(e1, res);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/omap/omap-mcpdm.c

@@ -480,9 +480,6 @@ static int asoc_mcpdm_probe(struct platform_device *pdev)
 	mcpdm->dma_data[1].filter_data = "up_link";
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
-	if (res == NULL)
-		return -ENOMEM;
-
 	mcpdm->io_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(mcpdm->io_base))
 		return PTR_ERR(mcpdm->io_base);