xhci: hub: export symbol on xhci_hub_control

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2122414
Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Tested: Verify USB-A and USB-C are functional on Nvidia Orin board,
 and no regressions on other platforms.

commit 2cbe475
Author: Jim Lin <jilin@nvidia.com>
Date:   Fri Nov 11 18:18:12 2022 +0800

    xhci: hub: export symbol on xhci_hub_control

    XHCI host drivers may override the default xhci_hub_control() with
    their own device specific function. To allow these host drivers to
    call the xhci_hub_control() function from within their own
    hub_control() callback and be built as a module, export the symbol
    for xhci_hub_control.

    Signed-off-by: Jim Lin <jilin@nvidia.com>
    Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
    Tested-by: Jon Hunter <jonathanh@nvidia.com>
    Acked-by: Thierry Reding <treding@nvidia.com>
    Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
    Link: https://lore.kernel.org/r/20221111101813.32482-3-jilin@nvidia.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    (cherry picked from commit 2cbe475)

Signed-off-by: David Marlin <dmarlin@redhat.com>

Author: damarlin

drivers/usb/host/xhci-hub.c

@@ -1609,6 +1609,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 	spin_unlock_irqrestore(&xhci->lock, flags);
 	return retval;
 }
+EXPORT_SYMBOL_GPL(xhci_hub_control);
 
 /*
  * Returns 0 if the status hasn't changed, or the number of bytes in buf.