commonlib: Move commonlib/cbmem_id.h to commonlib/bsd/

Libpayload requires cbmem_id.h file to support extracting values from
CBMEM IMD entries of coreboot tables. Libpayload use BSD-3-Clause
license, and all of its files used to compile a static library have to
use it too.

Change-Id: I97c080e34ebdbcdf14fe3a3c9515b1dea8ede179
Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59696
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <patrick@coreboot.org>

tests/lib/cbmem_stage_cache-test.c

@@ -2,7 +2,7 @@
 
 #include <tests/test.h>
 #include <cbmem.h>
-#include <commonlib/cbmem_id.h>
+#include <commonlib/bsd/cbmem_id.h>
 #include <stage_cache.h>
 
 #define CBMEM_SIZE (32 * KiB)