heads-up: planned changes in nvmm

[Maxime Villard <max%m00nbsd.net@localhost>]

[I am not subscribed to this list, so if you want to answer, make sure to
CC me.]

I will soon commit a set of changes in NVMM, which will require a full
rebuild and reinstallation of: the kernel NVMM driver, the libnvmm API,
the libnvmm ATF tests, and the qemu-nvmm package if you're using it.

You can cherry-pick each change, but it will be easier to just do a full
distribution rebuild and reinstall.

Overall it is no different than what I've been doing over the last six
months. This time, however, the changes will also be pulled up to 9beta
afterwards.

I will push my changes in -current and update the qemu-nvmm package in
several rounds probably over several days, and then will pull up to 9beta.

In the meantime, do not upgrade your qemu-nvmm package if you're on 9beta.