iwlwifi: Take the fw file name from the iwl_cfg.

This patch adds fw_name to iwl_cfg. This allows run time selection
of needed fw/ucode file

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.h b/drivers/net/wireless/iwlwifi/iwl-4965.h
index 0bfd1b4..057fa15 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.h
@@ -45,6 +45,13 @@
 #include "iwl-prph.h"
 #include "iwl-4965-debug.h"
 
+/* Change firmware file name, using "-" and incrementing number,
+ *   *only* when uCode interface or architecture changes so that it
+ *   is not compatible with earlier drivers.
+ * This number will also appear in << 8 position of 1st dword of uCode file */
+#define IWL4965_UCODE_API "-1"
+
+
 /* Default noise level to report when noise measurement is not available.
  *   This may be because we're:
  *   1)  Not associated (4965, no beacon statistics being sent to driver)