usb: xhci: avoid warning for !PM_SLEEP
If we build a kernel with PM_SUSPEND set and no PM_SLEEP, we get a build warning in the xhci-plat driver about unused functions. To fix this, use "#ifdef CONFIG_PM_SLEEP", like we do in most other drivers nowadays. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Cc: Mathias Nyman <mathias.nyman@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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