USB: EHCI: Export the ehci_hub_control function

Platform drivers sometimes need to perform specific handling of hub
control requests. Make this possible by exporting the ehci_hub_control()
function which can then be called from a custom hub control handler in
the default case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 7ef00ec..572634cd 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -51,10 +51,6 @@
 	bool has_hostpc;
 };
 
-static int (*orig_hub_control)(struct usb_hcd *hcd,
-				u16 typeReq, u16 wValue, u16 wIndex,
-				char *buf, u16 wLength);
-
 struct tegra_ehci_hcd {
 	struct tegra_usb_phy *phy;
 	struct clk *clk;
@@ -236,7 +232,7 @@
 	spin_unlock_irqrestore(&ehci->lock, flags);
 
 	/* Handle the hub control events here */
-	return orig_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
+	return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
 
 done:
 	spin_unlock_irqrestore(&ehci->lock, flags);
@@ -554,8 +550,6 @@
 	 * too easy.
 	 */
 
-	orig_hub_control = tegra_ehci_hc_driver.hub_control;
-
 	tegra_ehci_hc_driver.map_urb_for_dma = tegra_ehci_map_urb_for_dma;
 	tegra_ehci_hc_driver.unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma;
 	tegra_ehci_hc_driver.hub_control = tegra_ehci_hub_control;