udc: s3c-hsudc: Silence warning about supplies during deferred probe

Don't confuse user with meaningless warning about the failure in getting
supplies in case of deferred probe.
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/gadget/udc/s3c-hsudc.c

@@ -1285,7 +1285,8 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsudc->supplies),
 				 hsudc->supplies);
 	if (ret != 0) {
-		dev_err(dev, "failed to request supplies: %d\n", ret);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to request supplies: %d\n", ret);
 		goto err_supplies;
 	}