ARM: Handle case where new TLB size is different from previous TLB size.
ARM: Handle case where new TLB size is different from previous TLB size.

After a checkpoint we need to make sure that we restore the right
number of entries.

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