iwlwifi: iwl-trans.h doesn't need all these includes

We can use forward declaration for the relevant struct since they
aren't dereferenced in the header file.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index ca0fa9c..9f8b239 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -76,6 +76,7 @@
 #include "iwl-eeprom.h"
 #include "iwl-agn-hw.h"
 #include "iwl-core.h"
+#include "iwl-ucode.h"
 
 static int iwl_trans_rx_alloc(struct iwl_trans *trans)
 {