d2lte: move d2 to d2lte

Change-Id: Idd23124a2e8fdeb7fa4b07c00de05d2431457801
d2lte: remove propietary/lib_spi/
       These are identical to lib_spr, so we'll just use those instead.

Change-Id: Ib571905c9213616963c8d757de80d53fee3d546a