iwlagn: add missing includes

a few h files weren't self contained. Fix that.
Move iwl_dma_ptr to transport layer since it is not used by the upper layer
any more.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 78bd2f6..0da6ad5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -64,6 +64,10 @@
 #define __iwl_trans_h__
 
 #include <linux/debugfs.h>
+#include <linux/skbuff.h>
+
+#include "iwl-shared.h"
+#include "iwl-commands.h"
 
  /*This file includes the declaration that are exported from the transport
  * layer */