linux-next: build failure after merge of the usb tree

[Stephen Rothwell]

Hi all,

After merging the usb tree, today's linux-next build (s390 allmodconfig)
failed like this:

drivers/usb/host/xhci-pci.c:91:13: error: 'xhci_msix_sync_irqs' defined but not used [-Werror=unused-function]

(reported here: http://kisskb.ellerman.id.au/kisskb/buildresult/14902506/)

Caused by commit

  9abe15d55dcc ("xhci: Move xhci MSI sync function to to xhci-pci")

The function is only called if CONFIG_PM is set, but defined
unconditionally.

-- 
Cheers,
Stephen Rothwell

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