Multiple unrelated changes

* make -v switch print debug messages.
* do case insensitive comparison of mainboards, as wished on the
  mailinglist

Corresponding to flashrom svn r37 and coreboot v2 svn r2146.
diff --git a/debug.h b/debug.h
index 7d540b5..0614747 100644
--- a/debug.h
+++ b/debug.h
@@ -2,6 +2,9 @@
 #define __DEBUG_H__ 1
 
 //#define printf_debug(x...) printf(x)
-#define printf_debug(x...) { }
+
+extern int verbose;
+
+#define printf_debug(x...) { if(verbose) printf(x); }
 
 #endif