arch-arm: Make TLB misses from a sw prefetch visible
arch-arm: Make TLB misses from a sw prefetch visible

While a TLB hit caused by a prefetching operation is visible in terms
of TLB stats update, this is not the case for a TLB miss, which is
invisible to the stats as it is now.

This patch is realigning the behaviour to be more consistent: we will
always update the stats regardless of whether the access caused a
TLB hit/miss

Change-Id: I161e04fc09a0dbba7468a52848aa7710d1476e19
Signed-off-by: Giacomo Travaglini <8eef13a4f970e2e9372c8d26ad0737b760f99c02@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37955
Reviewed-by: Tiago Mück <02f879f33eea3aaf6781160757a59709a6f01bed@arm.com>
Reviewed-by: Richard Cooper <5451b9f082a6f419264dc2e8898d5200257ca9ce@arm.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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