mem-cache: Fix panic in Indirect Memory prefetcher
mem-cache: Fix panic in Indirect Memory prefetcher

Memory requests with a size non-power-of-two and less than 8 values were causing
a panic, but there these should be allowed and ignored by the prefetcher.

Change-Id: I86baa60058cc8a7f232d6ba5748d4c24a463c840
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17733
Reviewed-by: Daniel Carvalho <91779fc734d358d9575ec4910de29bfcbcaf1b22@yahoo.com.br>
Reviewed-by: Nikos Nikoleris <b6a1b3cd9d36c44e9eeb16bc870df3cb2a0cf469@arm.com>
Maintainer: Nikos Nikoleris <b6a1b3cd9d36c44e9eeb16bc870df3cb2a0cf469@arm.com>

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