modules: update OpenWrt

6aef4bc7c3 lantiq: fritz7320: enable USB power supply
6bf5bfc19f openssl: bump to 1.1.1j
f44153038e OpenWrt v19.07.7: revert to branch defaults
d5ae565873 OpenWrt v19.07.7: adjust config defaults
c4a6851c72 kernel: bump 4.14 to 4.14.221
f8b849103d ramips: ethernet: Disable TSO support to improve stability