coreboot: introduce commonlib

Instead of reaching into src/include and re-writing code
allow for cleaner code sharing within coreboot and its
utilities. The additional thing needed at this point is
for the utilities to provide a printk() declaration within
a <console/console.h> file. That way code which uses printk()
can than be mapped properly to verbosity of utility parameters.

Change-Id: I9e46a279569733336bc0a018aed96bc924c07cdd
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11592
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/include/boot_device.h

@@ -20,7 +20,7 @@
 #ifndef _BOOT_DEVICE_H_
 #define _BOOT_DEVICE_H_
 
-#include <region.h>
+#include <commonlib/region.h>
 
 /* Return the region_device for the read-only boot device. */
 const struct region_device *boot_device_ro(void);