[testing] 21.02 for rt305x 4MB devices

git clone https://git.openwrt.org/openwrt/openwrt.git

git checkout openwrt-21.02

wget https://maurerr.github.io/openwrt-21.02-rt305x-4M/config.buildinfo

mv config.buildinfo .config

and then for up2date packages I run these scripts:

./scripts/feeds update -a
./scripts/feeds install -a

:white_check_mark:

It's compiling... hope my computer survives it :grimacing: