Merge tag 'mt76-for-kvalo-2019-03-07' of https://github.com/nbd168/wireless

mt76 patches for 5.1

* fix hardware restart for mt76x2
* fix writing txwi on USB devices
* fix (and disable by default) ED/CCA support on 76x2
* fix powersave issues on 7603
* fix return value check for ioremap on 7603
* fix duplicate USB device IDs