usb: dwc3: core: use devm_iremap_nocache() version

This just guarantees that this piece of memory
will be marked uncachable.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c34452a..4f2ef53 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -459,7 +459,7 @@
 		return -ENOMEM;
 	}
 
-	regs = devm_ioremap(dev, res->start, resource_size(res));
+	regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
 	if (!regs) {
 		dev_err(dev, "ioremap failed\n");
 		return -ENOMEM;