console code cleanup.

- drop srm console code (not supported anyways)
 - make internal uart8250 console functions static
 - split vsprintf.c into vsprintf.c and vtxprintf.c


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1585 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/console/printk.c

@@ -4,7 +4,6 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
  */
-//typedef void * va_list;
 
 #include <stdarg.h>
 #include <smp/spinlock.h>