kernel: extract kmod-sched-act-ipt from kmod-sched

There is only one module in kmod-sched that depends on iptables. Move it
to its own kmod package so we can drop the kmod-ipt-core dependency from
kmod-sched. This makes it possible to disable all kmod-ipt-* packages
without having to disable kmod-sched. Since we now default to firewall4
and nftables, we should avoid iptables dependencies where we can.

Signed-off-by: Stijn Tintel <[email protected]>

package/kernel/linux/modules/netsupport.mk

@@ -775,6 +775,22 @@ endef
 $(eval $(call KernelPackage,sched-act-sample))
 
 
+define KernelPackage/sched-act-ipt
+  SUBMENU:=$(NETWORK_SUPPORT_MENU)
+  TITLE:=IPtables targets
+  DEPENDS:=+kmod-ipt-core +kmod-sched-core
+  KCONFIG:=CONFIG_NET_ACT_IPT
+  FILES:=$(LINUX_DIR)/net/sched/act_ipt.ko
+  AUTOLOAD:=$(call AutoProbe, act_ipt)
+endef
+
+define KernelPackage/sched-act-ipt/description
+  Allows to invoke iptables targets after successful classification.
+endef
+
+$(eval $(call KernelPackage,sched-act-ipt))
+
+
 define KernelPackage/sched-act-vlan
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
   TITLE:=Traffic VLAN manipulation
@@ -948,13 +964,13 @@ endef
 $(eval $(call KernelPackage,bpf-test))
 
 
-SCHED_MODULES_EXTRA = sch_codel sch_dsmark sch_gred sch_multiq sch_sfq sch_teql sch_fq sch_pie act_ipt act_pedit act_simple act_csum em_cmp em_nbyte em_meta em_text
+SCHED_MODULES_EXTRA = sch_codel sch_dsmark sch_gred sch_multiq sch_sfq sch_teql sch_fq sch_pie act_pedit act_simple act_csum em_cmp em_nbyte em_meta em_text
 SCHED_FILES_EXTRA = $(foreach mod,$(SCHED_MODULES_EXTRA),$(LINUX_DIR)/net/sched/$(mod).ko)
 
 define KernelPackage/sched
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
   TITLE:=Extra traffic schedulers
-  DEPENDS:=+kmod-sched-core +kmod-ipt-core +kmod-lib-crc32c +kmod-lib-textsearch
+  DEPENDS:=+kmod-sched-core +kmod-lib-crc32c +kmod-lib-textsearch
   KCONFIG:= \
 	CONFIG_NET_SCH_CODEL \
 	CONFIG_NET_SCH_DSMARK \
@@ -964,7 +980,6 @@ define KernelPackage/sched
 	CONFIG_NET_SCH_TEQL \
 	CONFIG_NET_SCH_FQ \
 	CONFIG_NET_SCH_PIE \
-	CONFIG_NET_ACT_IPT \
 	CONFIG_NET_ACT_PEDIT \
 	CONFIG_NET_ACT_SIMP \
 	CONFIG_NET_ACT_CSUM \