iwlwifi: clean up declarations

A number of declarations in iwl-core.h should
be in agn specific files, and also rename the
iwl-calib.h file to iwl-agn-calib.h to better
reflect that it belongs to agn.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index b1af79e..763a93d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -57,7 +57,7 @@
 #include "iwl-io.h"
 #include "iwl-helpers.h"
 #include "iwl-sta.h"
-#include "iwl-calib.h"
+#include "iwl-agn-calib.h"
 #include "iwl-agn.h"