MAINTAINERS: add Zi Yan as co-maintainer for MEMORY MANAGEMENT - THP

Zi has been contributing to THP consistently and reliably over many
years and is considered one of our most valuable THP experts. As THP is
an especially active area lately, having a single dedicated THP maintainer
is not sustainable.

Fortunately, Zi volunteered to take on more responsibility by stepping
up as a THP co-maintainer. So let's do exactly that.

His placement in the MAINTAINERS entry is very convenient to perform
this change :)

Link: https://lore.kernel.org/20261030-maintainers-v1-3-97278f8a5f54@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Acked-by: Qi Zheng <qi.zheng@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: Harry Yoo (Meta) <harry@kernel.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: SJ Park <sj@kernel.org>
Acked-by: Barry Song <baohua@kernel.org>
Acked-by: Lance Yang <lance.yang@linux.dev>
Acked-by: Dev Jain <dev.jain@arm.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: SJ Park <sj@kernel.org>
Acked-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Christoph Lameter <cl@gentwo.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Gregory Price <gourry@gourry.net>
Cc: Hao Li <hao.li@linux.dev>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Nico Pache <nico.pache@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Will Deacon <will@kernel.org>
Cc: Xu Xin <xu.xin@linux.dev>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>

MAINTAINERS

@@ -17855,7 +17855,7 @@ F:	mm/swapfile.c
 MEMORY MANAGEMENT - THP (TRANSPARENT HUGE PAGE)
 M:	Andrew Morton <akpm@linux-foundation.org>
 M:	David Hildenbrand <david@kernel.org>
-R:	Zi Yan <ziy@nvidia.com>
+M:	Zi Yan <ziy@nvidia.com>
 R:	Baolin Wang <baolin.wang@linux.alibaba.com>
 R:	Liam R. Howlett <liam@infradead.org>
 R:	Nico Pache <nico.pache@linux.dev>