mmc: sh_mmcif: Remove dummy PM resume callback

Unassigned system sleep callbacks were always treated the same as dummy
callbacks that just return zero.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: geertu

drivers/mmc/host/sh_mmcif.c

@@ -1579,12 +1579,7 @@ static int sh_mmcif_suspend(struct device *dev)
 	return 0;
 }
 
-static int sh_mmcif_resume(struct device *dev)
-{
-	return 0;
-}
-
-static DEFINE_SIMPLE_DEV_PM_OPS(sh_mmcif_dev_pm_ops, sh_mmcif_suspend, sh_mmcif_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(sh_mmcif_dev_pm_ops, sh_mmcif_suspend, NULL);
 
 static struct platform_driver sh_mmcif_driver = {
 	.probe		= sh_mmcif_probe,