Update SPD_DDR4 size to be 640 bytes

ENTIRE_SPD field needs to be updated from 512 bytes
to 640 bytes for DDR DDIMM SPD.

Change-Id: I93ce4829336717bd621ecca4acb574daada7ae11
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/83030
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Glenn Miles <milesg@ibm.com>
Reviewed-by: Christian R Geddes <crgeddes@us.ibm.com>
Reviewed-by: Daniel M Crowell <dcrowell@us.ibm.com>

src/usr/vpd/spdDDR4_DDIMM.H

@@ -127,7 +127,7 @@ const KeywordData ddr4DDIMMData[] =
     { TCKMAX_FINE_OFFSET,               0x7c,   0x01,   0x00,   0x00, false, false, ALL },
     { BASE_CONFIG_CRC,                  0x7f,   0x02,   0x00,   0x00, true,  false, ALL },
     // Module Specific fields supported on DDR4 only
-    { ENTIRE_SPD,                       0x00,   0x200,   0x00,   0x00, false, false, ALL },
+    { ENTIRE_SPD,                       0x00,   0x280,  0x00,   0x00, false, false, ALL },
     //---------------------------------------------------------------------------------------
 };