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/mainboard/bap/ode_e20XX/romstage.c

@@ -30,7 +30,7 @@
 #include <arch/cpu.h>
 #include <cpu/x86/lapic.h>
 #include <console/console.h>
-#include <console/loglevel.h>
+#include <commonlib/loglevel.h>
 #include <cpu/amd/car.h>
 #include <northbridge/amd/agesa/agesawrapper.h>
 #include <cpu/x86/bist.h>