openvswitch: upgrade to version 2.7.0

Notes:
- drop un-needed patches
- bump kernel support up to 4.9
- switch from git repo to release tarball
- use OVS intree kernel module ; seems that using the kernel module
  from the package has certain issues due to the glue/backport code
  that tries to adapt to many kernel versions and has a potential
  to mess up ; not to mention, the glue code makes the kmod
  a few times larger than it should be
- tested on x86_64 VM

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

net/openvswitch/Makefile

@@ -12,43 +12,22 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=openvswitch
 
-PKG_RELEASE:=7
-PKG_VERSION:=2.5.0
+PKG_RELEASE:=1
+PKG_VERSION:=2.7.0
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 PKG_LICENSE:=Apache-2.0
 PKG_LICENSE_FILES:=COPYING
 PKG_USE_MIPS16:=0
 
-PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL:=https://github.com/openvswitch/ovs
-PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=22d4614ddf83988a3771fb379ea029e663b4455a
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://openvswitch.org/releases/
+PKG_HASH:=e492cf08a929b4a2178b7f9b01dc4ff562f44138b547b4e942078187b2445d2e
 
 PKG_BUILD_PARALLEL:=1
 PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1
 
-# Upstream package supports kernels between 2.6.32 and 4.3 
-# see https://github.com/openvswitch/ovs/blob/master/FAQ.md
-# This list is pruned to only those kernels used in OpenWRT
-# Support for kernel 4.4 is backported
-SUPPORTED_KERNELS:=LINUX_3_18||LINUX_4_1||LINUX_4_3||LINUX_4_4
-
-# If only kmod-openvswitch is enabled, then override default make path to only
-# build and install the datapath/linux subdirectory which cuts down compilation
-# time dramatically.
-ifeq ($(CONFIG_PACKAGE_openvswitch-base),)
- ifneq ($(CONFIG_PACKAGE_kmod-openvswitch),)
-  MAKE_PATH := datapath/linux
- endif
-endif
-
-# Additionally register PKG_CONFIG_DEPENDS to trigger a rebuild of the code
-# base if the package selection changes.
-PKG_CONFIG_DEPENDS := \
-	CONFIG_PACKAGE_openvswitch-base \
-	CONFIG_PACKAGE_kmod-openvswitch
+SUPPORTED_KERNELS:=LINUX_3_18||LINUX_4_1||LINUX_4_3||LINUX_4_4||LINUX_4_9
 
 include $(INCLUDE_DIR)/package.mk
 $(call include_mk, python-package.mk)
@@ -131,10 +110,17 @@ define KernelPackage/openvswitch
   CATEGORY:=Kernel modules
   SUBMENU:=Network Support
   TITLE:=Open vSwitch Kernel Package
-  KCONFIG:=CONFIG_BRIDGE
-  DEPENDS:=+kmod-stp @IPV6 +kmod-gre +kmod-lib-crc32c +kmod-vxlan +kmod-nf-conntrack +kmod-nf-conntrack6 @($(SUPPORTED_KERNELS))
-  FILES:= \
-	$(PKG_BUILD_DIR)/datapath/linux/openvswitch.$(LINUX_KMOD_SUFFIX)
+  KCONFIG:= \
+	CONFIG_BRIDGE \
+	CONFIG_OPENVSWITCH \
+	CONFIG_OPENVSWITCH_GRE=n \
+	CONFIG_OPENVSWITCH_VXLAN=n \
+	CONFIG_OPENVSWITCH_GENEVE=n
+  DEPENDS:= \
+	@IPV6 +kmod-gre +kmod-lib-crc32c +kmod-mpls \
+	+kmod-vxlan +kmod-nf-nat +kmod-nf-nat6  \
+	@($(SUPPORTED_KERNELS))
+  FILES:= $(LINUX_DIR)/net/openvswitch/openvswitch.ko
   AUTOLOAD:=$(call AutoLoad,21,openvswitch)
 endef
 
@@ -177,10 +163,10 @@ define Package/openvswitch-base/install
 	$(INSTALL_BIN) ./files/etc/init.d/openvswitch.init $(1)/etc/init.d/openvswitch
 
 	$(INSTALL_DIR) $(1)/usr/lib/
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libofproto.so*  $(1)/usr/lib/
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libopenvswitch.so*  $(1)/usr/lib/
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libovsdb.so*  $(1)/usr/lib/
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libsflow.so*  $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libofproto*.so*  $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libopenvswitch*.so*  $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libovsdb*.so*  $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libsflow*.so*  $(1)/usr/lib/
 
 	$(INSTALL_DIR) $(1)/usr/bin/
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/ovsdb-tool $(1)/usr/bin/