iptables: split physdev match out as a separate package

Split physdev match out of ipt-extra to allow installing ipt-extra without
pulling in br-netfilter.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

package/kernel/linux/modules/netfilter.mk

@@ -686,7 +686,7 @@ define KernelPackage/ipt-extra
   KCONFIG:=$(KCONFIG_IPT_EXTRA)
   FILES:=$(foreach mod,$(IPT_EXTRA-m),$(LINUX_DIR)/net/$(mod).ko)
   AUTOLOAD:=$(call AutoProbe,$(notdir $(IPT_EXTRA-m)))
-  $(call AddDepends/ipt,+kmod-br-netfilter)
+  $(call AddDepends/ipt)
 endef
 
 define KernelPackage/ipt-extra/description
@@ -694,7 +694,6 @@ define KernelPackage/ipt-extra/description
  Includes:
  - addrtype
  - owner
- - physdev (if bridge support was enabled in kernel)
  - pkttype
  - quota
 endef
@@ -702,6 +701,21 @@ endef
 $(eval $(call KernelPackage,ipt-extra))
 
 
+define KernelPackage/ipt-physdev
+  TITLE:=physdev module
+  KCONFIG:=$(KCONFIG_IPT_PHYSDEV)
+  FILES:=$(foreach mod,$(IPT_PHYSDEV-m),$(LINUX_DIR)/net/$(mod).ko)
+  AUTOLOAD:=$(call AutoProbe,$(notdir $(IPT_PHYSDEV-m)))
+  $(call AddDepends/ipt,+kmod-br-netfilter)
+endef
+
+define KernelPackage/ipt-physdev/description
+ The iptables physdev kernel module
+endef
+
+$(eval $(call KernelPackage,ipt-physdev))
+
+
 define KernelPackage/ip6tables
   SUBMENU:=$(NF_MENU)
   TITLE:=IPv6 modules