Move SPI code out of board_enable.c where it started its life. The SPI
chip finding and SPI chip accessor code is moved as well. This can be
split later if we feel like it.
The non-use of svn cp is intentional because the only history we'd have
to preserve are a few commits which were early prototypes of chip
identification code. For those who intend to look at that history, they
can look at board_enable.c revision 2853.
Signed-off-by: Carl-Daniel Hailfinger <firstname.lastname@example.org>
Acked-by: Stefan Reinauer <email@example.com>