usb: ehci: Make usage of generic_{setup,shutdown}_phy() helpers

Replace ehci_setup_phy() and ehci_shutdown_phy () by respectively
generic_setup_phy() and generic_shutdown_phy().

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 1ab3061..e98ab31 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -31,7 +31,7 @@
 	int ret;
 	u32 cmd;
 
-	ret = ehci_setup_phy(dev, &priv->phy, 0);
+	ret = generic_setup_phy(dev, &priv->phy, 0);
 	if (ret)
 		return ret;
 
@@ -149,7 +149,7 @@
 	if (ret)
 		return ret;
 
-	return ehci_shutdown_phy(dev, &priv->phy);
+	return generic_shutdown_phy(&priv->phy);
 }
 
 static const struct udevice_id ehci_pci_ids[] = {