util/nvmutil: major cleanup

handle init in xstatus()

it's now a singleton design

also tidied up some other code

also removed todo.c. bloat.
will do all those anyway.

too much change. i just kept
touching the code until it
looked good

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/nvmutil/lib/num.c

@@ -45,9 +45,7 @@ hextonum(char ch_s)
 	return 16; /* invalid character */
 }
 
-/*
- * Portable random
- * number generator
+/* Random numbers
  */
 unsigned long
 rlong(void)