memcg: remove __mod_lruvec_state

memcg: remove __mod_lruvec_state

__mod_lruvec_state() is already safe against irqs, so there is no need to
have a separate interface (i.e.  mod_lruvec_state) which wraps calls to it
with irq disabling and reenabling.  Let's rename __mod_lruvec_state() to
mod_lruvec_state().

Link: https://lkml.kernel.org/r/20251110232008.1352063-4-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>