[coreboot] small patch for prototypes and unused variables

[Myles Watson]

Maciej,

Thanks for the patch.  I think most of it is ready to be committed.

Index: src/lib/clog2.c
===================================================================
--- src/lib/clog2.c	(revision 4869)
+++ src/lib/clog2.c	(working copy)
@@ -7,6 +7,8 @@
 /* Assume 8 bits per byte */
 #define CHAR_BIT 8
 
+unsigned long log2(unsigned long x);
+
 unsigned long log2(unsigned long x)
 {
         // assume 8 bits per byte.

Things like this make me wonder if we should just turn off the warning.  Is
there a header file where we can put some of these prototypes?

Thanks,
Myles