ARM: OMAP: hsmmc: fix return value check in omap_hsmmc_init_one()

In case of error, the function omap_device_alloc() returns ERR_PTR()
not NULL pointer. The NULL test in the return value check should
be replaced with IS_ERR().

dpatch engine is used to auto generated this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/hsmmc.c

@@ -523,7 +523,7 @@ static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
 	dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
 
 	od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
-	if (!od) {
+	if (IS_ERR(od)) {
 		pr_err("Could not allocate od for %s\n", name);
 		goto put_pdev;
 	}