mt76-backports

backport origin mt76 and mac80211/cfg80211 drivers to
18.06.x OpenWrt out-side-tree (won't dirty your source tree).

============================================================================

1. set OWRT_DIR if your openwrt source tree is not '../openwrt'

	$ export OWRT_DIR=/path/to/openwrt/sourcetree

2. run ./mount-overlayfs.sh and enter sudo password

	$ ./mount-overlayfs.sh
	[sudo] password for xxxx:

3. run ./compile-driver.sh to compile drivers to 'build' directory

	$ ./compile-driver.sh
	openwrt is a mountpoint
	Collecting package info: done
	#
	# configuration written to .config
	#
	time: target/linux/prereq#0.25#0.04#0.29
	 make[1] package/kernel/mac80211/compile
	 make[2] -C package/libs/toolchain compile
	 make[2] -C package/firmware/b43legacy-firmware compile
	 make[2] -C package/firmware/linux-firmware compile
	 make[2] -C package/firmware/prism54-firmware compile
	 make[2] -C package/firmware/wireless-regdb compile
	 make[2] -C package/libs/openssl compile
	 make[2] -C package/libs/gettext compile
	 make[2] -C package/libs/libiconv compile
	 make[2] -C package/libs/libtool compile
	 make[2] -C package/libs/libjson-c compile
	 make[2] -C package/utils/lua compile
	 make[2] -C package/libs/libnl-tiny compile
	 make[2] -C package/kernel/linux compile
	 make[2] -C package/libs/wolfssl compile
	 make[2] -C package/libs/libubox compile
	 make[2] -C package/network/utils/iw compile
	 make[2] -C package/system/ubus compile
	 make[2] -C package/network/services/hostapd compile
	 make[2] -C package/kernel/mac80211 compile
	 make[1] package/kernel/mt76/compile
	 make[2] -C package/libs/toolchain compile
	 make[2] -C package/firmware/linux-firmware compile
	 make[2] -C package/firmware/prism54-firmware compile
	 make[2] -C package/firmware/b43legacy-firmware compile
	 make[2] -C package/firmware/wireless-regdb compile
	 make[2] -C package/libs/openssl compile
	 make[2] -C package/libs/gettext compile
	 make[2] -C package/libs/libiconv compile
	 make[2] -C package/libs/libtool compile
	 make[2] -C package/libs/libjson-c compile
	 make[2] -C package/utils/lua compile
	 make[2] -C package/libs/libnl-tiny compile
	 make[2] -C package/libs/wolfssl compile
	 make[2] -C package/libs/libubox compile
	 make[2] -C package/network/utils/iw compile
	 make[2] -C package/system/ubus compile
	 make[2] -C package/kernel/linux compile
	 make[2] -C package/network/services/hostapd compile
	 make[2] -C package/kernel/mac80211 compile
	 make[2] -C package/kernel/mt76 compile
	#
	# configuration written to .config
	#
	time: target/linux/prereq#0.23#0.05#0.33
	 make[1] package/kernel/mac80211/compile
	 make[2] -C package/libs/toolchain compile
	 make[2] -C package/firmware/b43legacy-firmware compile
	 make[2] -C package/firmware/linux-firmware compile
	 make[2] -C package/firmware/prism54-firmware compile
	 make[2] -C package/firmware/wireless-regdb compile
	 make[2] -C package/libs/openssl compile
	 make[2] -C package/libs/gettext compile
	 make[2] -C package/libs/libiconv compile
	 make[2] -C package/libs/libtool compile
	 make[2] -C package/libs/libjson-c compile
	 make[2] -C package/utils/lua compile
	 make[2] -C package/libs/libnl-tiny compile
	 make[2] -C package/libs/wolfssl compile
	 make[2] -C package/libs/libubox compile
	 make[2] -C package/network/utils/iw compile
	 make[2] -C package/system/ubus compile
	 make[2] -C package/kernel/linux compile
	 make[2] -C package/network/services/hostapd compile
	 make[2] -C package/kernel/mac80211 compile
	 make[1] package/kernel/mt76/compile
	 make[2] -C package/libs/toolchain compile
	 make[2] -C package/firmware/linux-firmware compile
	 make[2] -C package/firmware/prism54-firmware compile
	 make[2] -C package/firmware/b43legacy-firmware compile
	 make[2] -C package/firmware/wireless-regdb compile
	 make[2] -C package/libs/openssl compile
	 make[2] -C package/libs/gettext compile
	 make[2] -C package/libs/libiconv compile
	 make[2] -C package/libs/libtool compile
	 make[2] -C package/libs/libjson-c compile
	 make[2] -C package/utils/lua compile
	 make[2] -C package/libs/libnl-tiny compile
	 make[2] -C package/libs/wolfssl compile
	 make[2] -C package/libs/libubox compile
	 make[2] -C package/network/utils/iw compile
	 make[2] -C package/system/ubus compile
	 make[2] -C package/kernel/linux compile
	 make[2] -C package/network/services/hostapd compile
	 make[2] -C package/kernel/mac80211 compile
	 make[2] -C package/kernel/mt76 compile
	cp: cannot stat 'bin/targets/ramips/mt7621/packages/kmod-rt2800*.ipk': No such file or directory

	
4. (optional) run ./unpack-ipks.sh to extract ipks to 'rootfs' directory

============================================================================

Tips: Make sure you have a good Internet connection at compile time.