Update Part Number field side for DDR4 DDIMM spd layout
Update Part Number field side for DDR4 DDIMM spd layout

Originally we had this set to 0x30 (48) bytes but now it seems the
spec says its only 0x1E (30) bytes. This commit update to the new
value that the spec is indicating.

Change-Id: I3ba643411a51fdd0df731119dce371bd16435944
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/85980
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Nicholas E Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot