arm64/mm: Delete __init region from memblock.reserved

arm64/mm: Delete __init region from memblock.reserved

If CONFIG_ARCH_KEEP_MEMBLOCK is enabled, the memory information in
memblock will be retained.  We release the __init memory here, and
we should also delete the corresponding region in memblock.reserved,
which allows debugfs/memblock/reserved to display correct memory
information.

Signed-off-by: Rong Qianfeng <rongqianfeng@vivo.com>
Link: https://lore.kernel.org/r/20240902023940.43227-1-rongqianfeng@vivo.com
Signed-off-by: Will Deacon <will@kernel.org>