Reset when USB altsetting is reset to 0
In isochronous USB, an interface has multiple altsettings. altsetting '0' is basically turning off the isochronous streams, and we apparently need to implement resetting the E1 IP core at that point.
- Status changed from New to In Progress
- % Done changed from 0 to 80
- implemented in https://gerrit.osmocom.org/c/osmo-e1-hardware/+/21784