usb: Fix compiler warning with gcc4.4
ehci-hcd.c: In function 'ehci_submit_root': ehci-hcd.c:719: warning: value computed is not used ehci-hcd.c:748: warning: value computed is not used Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NRemy Bohmer <linux@bohmer.net>
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