iwlwifi: create new subdirectory for FW interaction

There's a lot of mvm code that really should be more generic
and part of the iwlwifi module. Start by making a place to
keep such code - in the new "fw" subdirectory - and already
move the firmware related header files there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
index b5ebd0f..6fdb592 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
@@ -76,7 +76,7 @@
 #include "iwl-trans.h"
 #include "iwl-op-mode.h"
 #include "iwl-agn-hw.h"
-#include "iwl-fw.h"
+#include "fw/img.h"
 #include "iwl-config.h"
 #include "iwl-modparams.h"