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.

Corresponding to flashrom svn r145 and coreboot v2 svn r2857.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
diff --git a/Makefile b/Makefile
index c6d8108..087a7a5 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@
 	am29f040b.o mx29f002.o sst39sf020.o m29f400bt.o w49f002u.o \
 	82802ab.o msys_doc.o pm49fl004.o sst49lf040.o sst49lfxxxc.o \
 	sst_fwhub.o layout.o lbtable.o flashchips.o flashrom.o \
-	sharplhf00l04.o w29ee011.o
+	sharplhf00l04.o w29ee011.o spi.o
 
 all: pciutils dep $(PROGRAM)