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>

src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
+/* SPDX-License-Identifier: BSD-3-Clause */
 
 #ifndef _CBMEM_ID_H_
 #define _CBMEM_ID_H_