usbdebug: Fix missing include

Change-Id: I74d28c13e6597c56e3b85ccd2b83386b86c200f0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3828
Tested-by: build bot (Jenkins)
1 file changed