Make "prepare filesystem" softraid aware, fix arm64 softraid install
On EFI platforms, 'installboot -p' on a softraid volume will only prepare
the filesysem inside the volume and leave physical softraid chunks untouched
which leaves you with unbootable chunks.
The current workaround is to prepare chunks manually (see regress).
Fix it in the same spirit the actual "install" already works in softraid.c.
This is what mlarkin has already been tested in a combined diff with the
MD -> MI softraid merge bits from the previous commit.
Works fine on amd64, arm64 and sparc64 upgrades and installations.
OK jsing
projects / openbsd / commit