[weekly][linaro] report week ending 25 Feb

Progress:

* UM-2 [QEMU upstream maintainership] + Respins of a few patchsets that needed v2 + Looked at a few bugs since softfreeze for 7.0 is near + Amazingly my to-review queue is now almost empty * QEMU-420 [GICv4 emulation] + Implemented more of the redistributor code -- the last missing big piece is its handling of VMOVI, though there are also probably some loose ends to tidy up + Note that this isn't going to be in time for 7.0, so will likely go on the back-burner a bit in favour of release-critical items

thanks -- PMM