This PR changes memory and cache sizes in various parts of the gem5
codebase to use binary units (e.g. KiB) instead of metric units (e.g.
kB). This makes the codebase more consistent, as gem5 automatically
converts memory and cache sizes that are in metric units to binary
units.
This PR also adds a warning message to let users know when an
auto-conversion from base 10 to base 2 units occurs.
There were a few places in configs and in the comments of various files
where I didn't change the metric units, as I couldn't figure out where
the parameters with those units were being used.
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