Add pine64-plus machine
Add pine64-plus machine

Adds A64-based pine64-plus machine.

Signed-off-by: Matt Porter <c1d287ff3802a4aab0e3770389ea24a33314618b@konsulko.com>

twoerner/meta-sunxi,twoerner/meta-sunxi,linux-sunxi/meta-sunxi,net147/meta-sunxi,linux-sunxi/meta-sunxi,net147/meta-sunxi,linux-sunxi/meta-sunxi