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

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/3945-debug.c b/drivers/net/wireless/iwlegacy/3945-debug.c
index fc2d651..b73b425 100644
--- a/drivers/net/wireless/iwlegacy/3945-debug.c
+++ b/drivers/net/wireless/iwlegacy/3945-debug.c
@@ -27,7 +27,7 @@
  *****************************************************************************/
 
 #include "iwl-dev.h"
-#include "iwl-core.h"
+#include "common.h"
 #include "3945.h"
 
 static int il3945_stats_flag(struct il_priv *il, char *buf, int bufsz)