mem: Align cache timing to clock edges
mem: Align cache timing to clock edges

This patch changes the cache timing calculations such that the results
are aligned to clock edges.

Plenty stats change as a results of this patch.

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