enc2gen: unify imm/int optype tags and make flexible order for evex stores
enc2gen: unify imm/int optype tags and make flexible order for evex stores

Change-Id: I58b32bf8432779598f7d6d68b0998b975f16b706
(cherry picked from commit 6e3de91df47429259c500c3294f99e6e85d1c4bd)

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