board: freescale: Remove <common.h> and add needed includes

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Acked-by: Jason Liu <jason.hui.liu@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/freescale/common/i2c_mux.c b/board/freescale/common/i2c_mux.c
index d40b34f..89151cc 100644
--- a/board/freescale/common/i2c_mux.c
+++ b/board/freescale/common/i2c_mux.c
@@ -5,8 +5,9 @@
  * Copyright 2021 Microsoft Corporation
  */
 
-#include <common.h>
+#include <config.h>
 #include <i2c.h>
+#include <stdio.h>
 #include "i2c_common.h"
 #include "i2c_mux.h"