commonlib: Add CBMEM tag id for CSE FW Update

cbfs_unverified_area_cbmem_alloc() expects a tag id to allocate space
to decompress ME_RW blobs within the CBMEM area, add a tag id for it.

BRANCH=firmware-brya-14505.B

Change-Id: I32f44496d389e3a7e4f2573ee4e46a145f7cd927
Signed-off-by: Krishna Prasad Bhat <krishna.p.bhat.d@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65365
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h b/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
index 4dadb0c..0cf9c7f 100644
--- a/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
+++ b/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
@@ -20,6 +20,7 @@
 #define CBMEM_ID_CONSOLE	0x434f4e53
 #define CBMEM_ID_CPU_CRASHLOG	0x4350555f
 #define CBMEM_ID_COVERAGE	0x47434f56
+#define CBMEM_ID_CSE_UPDATE	0x43534555
 #define CBMEM_ID_EHCI_DEBUG	0xe4c1deb9
 #define CBMEM_ID_ELOG		0x454c4f47
 #define CBMEM_ID_FREESPACE	0x46524545