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/mp.c b/cmd/mp.c
index 1b4373f..b9b5e01 100644
--- a/cmd/mp.c
+++ b/cmd/mp.c
@@ -3,9 +3,9 @@
  * Copyright 2008-2009 Freescale Semiconductor, Inc.
  */
 
-#include <common.h>
 #include <command.h>
 #include <cpu_func.h>
+#include <vsprintf.h>
 
 static int cpu_status_all(void)
 {