net: e1000: Move #include of common.h to the C files

We cannot currently include any header files in the C files since common.h
needs to be included first, and it is in the header file. Move it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Apalis T30 2GB on Apalis Evaluation Board
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index e816410..187517b 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -29,6 +29,7 @@
  *  Copyright 2011 Freescale Semiconductor, Inc.
  */
 
+#include <common.h>
 #include "e1000.h"
 
 #define TOUT_LOOP   100000