iwlegacy: rename iwl-core.h to common.h

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>

drivers/net/wireless/iwlegacy/4965.c

@@ -39,7 +39,7 @@
 
 #include "iwl-eeprom.h"
 #include "iwl-dev.h"
-#include "iwl-core.h"
+#include "common.h"
 #include "iwl-io.h"
 #include "iwl-helpers.h"
 #include "iwl-sta.h"