usb: phy: msm: change devm_ioremap() to devm_ioremap_resource()

There are several issues here:
1) platform_get_resource() can return NULL and that wasn't handled.
2) We should request the memory before we remap it, and
   devm_ioremap_resource() does that.
3) devm_ioremap() returns a NULL but we were checking for IS_ERR().

Fixes: 6b99c68 ('usb: phy: msm: Migrate to Managed Device Resource allocation')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-msm-usb.c

@@ -1586,7 +1586,7 @@ static int msm_otg_probe(struct platform_device *pdev)
 				      np ? "alt_core" : "usb_hs_core_clk");
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	motg->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(motg->regs))
 		return PTR_ERR(motg->regs);