read_xed_db: comment about SRM vs RM
read_xed_db: comment about SRM vs RM

Change-Id: I5e88a7dc64ae739cfe7490ed1f8778f989715e75
(cherry picked from commit bde2cb071e94be9afe06f1de8ddcf6643712c13a)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed