luci app flow HWNAT depends fix

feeds.conf.default

@@ -1,4 +1,4 @@
 src-git packages https://github.com/openwrt/packages.git;openwrt-18.06
-src-git luci https://github.com/openwrt/luci.git^80cb4fef8c7db0dadc373fef122d7abb092a7191
+src-git luci https://github.com/openwrt/luci.git^fb70693b7db1d4fcaf79f1ed2a3dadd9cd0ecd45
 src-git routing https://git.openwrt.org/feed/routing.git;openwrt-18.06
 #src-git telephony https://git.openwrt.org/feed/telephony.git;openwrt-18.06

package/lean/luci-app-flowoffload/Makefile

@@ -9,7 +9,7 @@ LUCI_TITLE:=LuCI support for Flow Offload
 LUCI_DEPENDS:=@LINUX_4_14
 LUCI_PKGARCH:=all
 PKG_VERSION:=1.0
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 
 include $(TOPDIR)/feeds/luci/luci.mk
 

package/lean/luci-app-flowoffload/luasrc/controller/flowoffload.lua

@@ -1,7 +1,7 @@
 module("luci.controller.flowoffload", package.seeall)
 
 function index()
-	if not nixio.fs.access("/etc/config/firewall") then
+	if not nixio.fs.access("/sys/module/xt_FLOWOFFLOAD/refcnt") then
 		return
 	end
 	local page

package/lean/luci-app-flowoffload/luasrc/model/cbi/flowoffload.lua

@@ -19,6 +19,7 @@ hw = s:option(Flag, "flow_offloading_hw", translate("HWNAT"))
 hw.default = 0
 hw.rmempty = false
 hw.description = translate("Enable Hardware NAT (depends on hw capability like MTK 762x)")
+hw:depends( "flow_offloading", 1)