devlink: push region related code into separate file

Cut out another chunk from leftover.c and put region related code
into a separate file.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230828061657.300667-9-jiri@resnulli.usSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/devlink/Makefile

 # SPDX-License-Identifier: GPL-2.0
 
 obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o port.o sb.o dpipe.o \
-	 resource.o param.o health.o
+	 resource.o param.o region.o health.o

net/devlink/devl_internal.h

@@ -158,6 +158,8 @@ void devlink_ports_notify_register(struct devlink *devlink);
 void devlink_ports_notify_unregister(struct devlink *devlink);
 void devlink_params_notify_register(struct devlink *devlink);
 void devlink_params_notify_unregister(struct devlink *devlink);
+void devlink_regions_notify_register(struct devlink *devlink);
+void devlink_regions_notify_unregister(struct devlink *devlink);
 
 /* Ports */
 #define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port)				\
@@ -249,6 +251,10 @@ int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
 				       struct genl_info *info);
 int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
 				       struct genl_info *info);
+int devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_region_del(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
+				      struct netlink_callback *cb);
 int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 					    struct genl_info *info);
 int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,