encgen: byte ops with REG_AL and imm8
encgen: byte ops with REG_AL and imm8

Change-Id: I1664d5fb3630d4804b9f68324e46fcfdafdeb0d5
(cherry picked from commit eae7ca4c1fb65451e5daa5d58a92cbbc31ce4050)

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