Add support for SST49LF040

Corresponding to flashrom svn r5 and coreboot v2 svn r1422.
diff --git a/sst49lf040.h b/sst49lf040.h
new file mode 100644
index 0000000..292ebe9
--- /dev/null
+++ b/sst49lf040.h
@@ -0,0 +1,8 @@
+#ifndef __SST49LF040_H__
+#define __SST49LF040_H__ 1
+
+extern int probe_49lf040 (struct flashchip * flash);
+extern int erase_49lf040 (struct flashchip * flash);
+extern int write_49lf040 (struct flashchip * flash, unsigned char * buf);
+
+#endif /* !__SST49LF040_H__ */