Add attribute for SPD_REVISION (byte 1)

Rename previous uses of Byte 192, the ddimm module spd section
to avoid ambiguity. Renamed from spd_revision --> ddimm_module_spd_revision

git-coreq:hostboot:I039173097619111ae5847660472e75ed9f2d5f1d
git-coreq:sbe:I039173097619111ae5847660472e75ed9f2d5f1d
git-coreq:hwsv:I039173097619111ae5847660472e75ed9f2d5f1d
Change-Id: I039173097619111ae5847660472e75ed9f2d5f1d
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/90410
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Reviewed-by: STEPHEN GLANCY <sglancy@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: Jennifer A Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/90506
Reviewed-by: RAJA DAS <rajadas2@in.ibm.com>

src/import/generic/memory/lib/utils/shared/mss_generic_consts.H

@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER sbe Project                                                  */
 /*                                                                        */
-/* Contributors Listed Below - COPYRIGHT 2018,2019                        */
+/* Contributors Listed Below - COPYRIGHT 2018,2020                        */
 /* [+] Evan Lojewski                                                      */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
@@ -271,6 +271,7 @@ enum generic_ffdc_codes
 
     SET_RCD_MFG_ID = 0x109B,
     SET_DRAM_MODULE_HEIGHT = 0x109C,
+    SET_SPD_REVISION = 0x109D,
 };
 
 ///