main/linux-lts: remove call of annotate_reachable on loongarch

annotate_reachable got dropped in
https://lore.kernel.org/all/20250305174506.868421566@linuxfoundation.org/,
but https://lore.kernel.org/all/20241128094312.133437051@infradead.org/
was not backported.

(cherry picked from commit 82fc60a1)