No, I do not include packet injection for wl1251 driver in default power-kernel. It is not stable.

Packet injection for power kernel will be in future in external deb package (users can decide to install or not new wl1251 driver). Lxp has created some scripts for building its driver in power-kernel (not released yet).

So I do not care about packet injection. All patches needed to build new wl1251 driver are applied in v47. So if somebody want to build it, there are no problems (and is not needed to recompile power-kernel).