USB: Use usb_disabled() consistently

At few places we have used usb_disabled() and at other places used 'nousb'
directly. Lets be consistent and use usb_disabled();

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed