Changeset 9182:3377bf0ff708
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ARM: don't set cache fields of CTR reg if there are no caches

currently the CTR reg sets its fields based on the block size of
the peer connected to its inst port. in the cache where there are
no caches it doesn't make sense to do so. this patch sets only
the relevant fields of the CTR reg if there are no caches and
leaves the cache-related fields as 0.