netlink: specs: mptcp: rename the MPTCP path management spec

We assume in handful of places that the name of the spec is
the same as the name of the family. We could fix that but
it seems like a fair assumption to make. Rename the MPTCP
spec instead.
Reviewed-by: Mat Martineau <martineau@kernel.org>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -15099,7 +15099,7 @@ W:	https://github.com/multipath-tcp/mptcp_net-next/wiki
 B:	https://github.com/multipath-tcp/mptcp_net-next/issues
 T:	git https://github.com/multipath-tcp/mptcp_net-next.git export-net
 T:	git https://github.com/multipath-tcp/mptcp_net-next.git export
-F:	Documentation/netlink/specs/mptcp.yaml
+F:	Documentation/netlink/specs/mptcp_pm.yaml
 F:	Documentation/networking/mptcp-sysctl.rst
 F:	include/net/mptcp.h
 F:	include/trace/events/mptcp.h

include/uapi/linux/mptcp_pm.h

 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
 /* Do not edit directly, auto-generated from: */
-/*	Documentation/netlink/specs/mptcp.yaml */
+/*	Documentation/netlink/specs/mptcp_pm.yaml */
 /* YNL-GEN uapi header */
 
 #ifndef _UAPI_LINUX_MPTCP_PM_H

net/mptcp/mptcp_pm_gen.c

 // SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
 /* Do not edit directly, auto-generated from: */
-/*	Documentation/netlink/specs/mptcp.yaml */
+/*	Documentation/netlink/specs/mptcp_pm.yaml */
 /* YNL-GEN kernel source */
 
 #include <net/netlink.h>

net/mptcp/mptcp_pm_gen.h

 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
 /* Do not edit directly, auto-generated from: */
-/*	Documentation/netlink/specs/mptcp.yaml */
+/*	Documentation/netlink/specs/mptcp_pm.yaml */
 /* YNL-GEN kernel header */
 
 #ifndef _LINUX_MPTCP_PM_GEN_H