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

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/3945.c b/drivers/net/wireless/iwlegacy/3945.c
index ff8818b..795d206 100644
--- a/drivers/net/wireless/iwlegacy/3945.c
+++ b/drivers/net/wireless/iwlegacy/3945.c
@@ -42,7 +42,7 @@
 #include "commands.h"
 #include "iwl-sta.h"
 #include "iwl-eeprom.h"
-#include "iwl-core.h"
+#include "common.h"
 #include "iwl-helpers.h"
 #include "iwl-led.h"
 #include "3945.h"