cmd: Remove <common.h> and add needed includes

Remove <common.h> from all "cmd/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/trace.c b/cmd/trace.c
index 2e3ee1d..937e6a6 100644
--- a/cmd/trace.c
+++ b/cmd/trace.c
@@ -3,11 +3,11 @@
  * Copyright (c) 2011 The Chromium OS Authors.
  */
 
-#include <common.h>
 #include <command.h>
 #include <env.h>
 #include <mapmem.h>
 #include <trace.h>
+#include <vsprintf.h>
 #include <asm/io.h>
 
 static int get_args(int argc, char *const argv[], char **buff,