usb: phy: generic: Add wakeup capability

In case USB phy is the wakeup source, enable its wakeup
capability.
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1666764742-4201-2-git-send-email-jun.li@nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/phy/phy-generic.c

@@ -286,6 +286,7 @@ EXPORT_SYMBOL_GPL(usb_phy_gen_create_phy);
 static int usb_phy_generic_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct device_node *dn = dev->of_node;
 	struct usb_phy_generic	*nop;
 	int err;
 
@@ -323,6 +324,9 @@ static int usb_phy_generic_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, nop);
 
+	device_set_wakeup_capable(&pdev->dev,
+				  of_property_read_bool(dn, "wakeup-source"));
+
 	return 0;
 }