iwlwifi: split out firmware store

Through the driver, struct iwl_fw will
store the firmware. Split this out into
a separate file, iwl-fw.h, and make all
other code use it. To do this, also move
the log pointers into it, and remove the
knowledge of "nic" from everything.

Now the op_mode has a fw pointer, and
(unfortunately) for now the shared data
also needs to keep one for the transport
to access dump the error log -- I think
that will move later.

Since I wanted to constify the firmware
pointers, some more changes were needed.

Signed-off-by: Johannes Berg <johannes.berg@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 6fa0c86..ec5249c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -272,7 +272,7 @@
 
 	int (*start_hw)(struct iwl_trans *iwl_trans);
 	void (*stop_hw)(struct iwl_trans *iwl_trans);
-	int (*start_fw)(struct iwl_trans *trans, struct fw_img *fw);
+	int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw);
 	void (*fw_alive)(struct iwl_trans *trans);
 	void (*stop_device)(struct iwl_trans *trans);
 
@@ -400,7 +400,8 @@
 	trans->state = IWL_TRANS_FW_ALIVE;
 }
 
-static inline int iwl_trans_start_fw(struct iwl_trans *trans, struct fw_img *fw)
+static inline int iwl_trans_start_fw(struct iwl_trans *trans,
+				     const struct fw_img *fw)
 {
 	might_sleep();