phy: qcom-qmp: Quiet -EPROBE_DEFER from qcom_qmp_phy_probe()

The -EPROBE_DEFER virus demands special case code to avoid printing
error messages when the error is only -EPROBE_DEFER.  Spread the virus
to a new host: qcom_qmp_phy_probe().  Specifically handle when our
regulators might not be ready yet.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/qualcomm/phy-qcom-qmp.c

@@ -1586,7 +1586,9 @@ static int qcom_qmp_phy_probe(struct platform_device *pdev)
 
 	ret = qcom_qmp_phy_vreg_init(dev);
 	if (ret) {
-		dev_err(dev, "failed to get regulator supplies\n");
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get regulator supplies: %d\n",
+				ret);
 		return ret;
 	}