arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array

[ Upstream commit 875d742cf5327c93cba1f11e12b08d3cce7a88d2 ]

The loop that detects/populates cache information already has a bounds
check on the array size but does not account for cache levels with
separate data/instructions cache. Fix this by incrementing the index
for any populated leaf (instead of any populated level).

Fixes: 5d425c18 ("arm64: kernel: add support for cpu cache information")

Signed-off-by: Radu Rendec <rrendec@redhat.com>
Link: https://lore.kernel.org/r/20250206174420.2178724-1-rrendec@redhat.com


Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>