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/wol.c b/cmd/wol.c
index f0d6343..45d4ae3 100644
--- a/cmd/wol.c
+++ b/cmd/wol.c
@@ -7,9 +7,9 @@
 /*
  * Wake-on-LAN support
  */
-#include <common.h>
 #include <command.h>
 #include <net.h>
+#include <vsprintf.h>
 
 #if defined(CONFIG_CMD_WOL)
 void wol_set_timeout(ulong);