MAINTAINERS: Drop RDMA files from Hyper-V section

MAINTAINERS entries are organized by subsystem ownership, and the RDMA
files belong under drivers/infiniband. Remove the overly broad mana_ib
entries from the Hyper-V section, and instead add the Hyper-V mailing list
to CC on mana_ib patches.

This makes get_maintainer.pl behave more sensibly when running it on
mana_ib patches.

Fixes: 428ca2d ("MAINTAINERS: Add Long Li as a Hyper-V maintainer")
Link: https://patch.msgid.link/20260128-get-maintainers-fix-v1-1-fc5e58ce9f02@nvidia.com
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

Author: rleon

MAINTAINERS

@@ -11739,7 +11739,6 @@ F:	arch/x86/kernel/cpu/mshyperv.c
 F:	drivers/clocksource/hyperv_timer.c
 F:	drivers/hid/hid-hyperv.c
 F:	drivers/hv/
-F:	drivers/infiniband/hw/mana/
 F:	drivers/input/serio/hyperv-keyboard.c
 F:	drivers/iommu/hyperv-iommu.c
 F:	drivers/net/ethernet/microsoft/
@@ -11758,7 +11757,6 @@ F:	include/hyperv/hvhdk_mini.h
 F:	include/linux/hyperv.h
 F:	include/net/mana
 F:	include/uapi/linux/hyperv.h
-F:	include/uapi/rdma/mana-abi.h
 F:	net/vmw_vsock/hyperv_transport.c
 F:	tools/hv/
 
@@ -17318,6 +17316,7 @@ MICROSOFT MANA RDMA DRIVER
 M:	Long Li <longli@microsoft.com>
 M:	Konstantin Taranov <kotaranov@microsoft.com>
 L:	linux-rdma@vger.kernel.org
+L:	linux-hyperv@vger.kernel.org
 S:	Supported
 F:	drivers/infiniband/hw/mana/
 F:	include/net/mana