devlink: push rate related code into separate file

Cut out another chunk from leftover.c and put rate related code
into a separate file.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230828061657.300667-12-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 region.o health.o trap.o
+	 resource.o param.o region.o health.o trap.o rate.o

net/devlink/devl_internal.h

@@ -166,6 +166,8 @@ void devlink_trap_groups_notify_register(struct devlink *devlink);
 void devlink_trap_groups_notify_unregister(struct devlink *devlink);
 void devlink_traps_notify_register(struct devlink *devlink);
 void devlink_traps_notify_unregister(struct devlink *devlink);
+void devlink_rates_notify_register(struct devlink *devlink);
+void devlink_rates_notify_unregister(struct devlink *devlink);
 
 /* Ports */
 #define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port)				\
@@ -278,3 +280,6 @@ int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
 				       struct genl_info *info);
 int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
 					 struct genl_info *info);
+int devlink_nl_cmd_rate_set_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_rate_new_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_rate_del_doit(struct sk_buff *skb, struct genl_info *info);