x86: correct error in emms instruction. (transplanted from d4405a6bcc5abe6896161a09a77b88a6720bf1c2)
x86: correct error in emms instruction.
(transplanted from d4405a6bcc5abe6896161a09a77b88a6720bf1c2)

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin