MAINTAINERS: update smc section

Due to changes of my responsibilities within IBM i
can no longer act as maintainer for smc.

As a result of the co-operation with Alibaba over
the last years we decided to, once more, give them
more responsibility for smc by appointing
D. Wythe <alibuda@linux.alibaba.com> and
Dust Li <dust.li@linux.alibaba.com>
as maintainers as well.

Within IBM Sidraya Jayagond <sidraya@linux.ibm.com>
and Mahanta Jambigi <mjambigi@linux.ibm.com>
are going to take over the maintainership for smc.

Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Link: https://patch.msgid.link/20250626051653.4259-1-jaka@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Jan Karcher

MAINTAINERS

@@ -22564,9 +22564,11 @@ S:	Maintained
 F:	drivers/misc/sgi-xp/
 
 SHARED MEMORY COMMUNICATIONS (SMC) SOCKETS
+M:	D. Wythe <alibuda@linux.alibaba.com>
+M:	Dust Li <dust.li@linux.alibaba.com>
+M:	Sidraya Jayagond <sidraya@linux.ibm.com>
 M:	Wenjia Zhang <wenjia@linux.ibm.com>
-M:	Jan Karcher <jaka@linux.ibm.com>
-R:	D. Wythe <alibuda@linux.alibaba.com>
+R:	Mahanta Jambigi <mjambigi@linux.ibm.com>
 R:	Tony Lu <tonylu@linux.alibaba.com>
 R:	Wen Gu <guwen@linux.alibaba.com>
 L:	linux-rdma@vger.kernel.org