devlink: push dpipe related code into separate file

Cut out another chunk from leftover.c and put dpipe related code
into a separate file.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230828061657.300667-6-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 health.o \
+obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o port.o sb.o dpipe.o \
+	 health.o

net/devlink/devl_internal.h

@@ -231,6 +231,13 @@ int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
 					struct genl_info *info);
 int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
 					 struct genl_info *info);
+int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
+				     struct genl_info *info);
+int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
+				     struct genl_info *info);
+int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
+					    struct genl_info *info);
 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,