iwlwifi: add a pointer to the trans_cfg directly in trans

Add a pointer to the iwl_trans structure and point it to the trans
part of the cfg.  This is the first step in disassociating the trans
configuration from the rest of the configuration.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -743,6 +743,7 @@ struct iwl_trans_debug {
  *
  * @ops - pointer to iwl_trans_ops
  * @op_mode - pointer to the op_mode
+ * @trans_cfg: the trans-specific configuration part
  * @cfg - pointer to the configuration
  * @drv - pointer to iwl_drv
  * @status: a bit-mask of transport status flags
@@ -774,6 +775,7 @@ struct iwl_trans_debug {
 struct iwl_trans {
 	const struct iwl_trans_ops *ops;
 	struct iwl_op_mode *op_mode;
+	const struct iwl_cfg_trans_params *trans_cfg;
 	const struct iwl_cfg *cfg;
 	struct iwl_drv *drv;
 	enum iwl_trans_state state;