usbdebug: Drop old includes

Change-Id: I4786bff41fef924c72087c354e394bdc1996cadc
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3764
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/cpu/intel/haswell/haswell_init.c

@@ -35,7 +35,6 @@
 #include <cpu/x86/cache.h>
 #include <cpu/x86/name.h>
 #include <pc80/mc146818rtc.h>
-#include <usbdebug.h>
 #include "haswell.h"
 #include "chip.h"