iwlegacy: rename iwl-commands.h to commands.h

On the way remove also not needed iwl-fh.h include.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/3945-rs.c b/drivers/net/wireless/iwlegacy/3945-rs.c
index 0d2beba..4aa0432 100644
--- a/drivers/net/wireless/iwlegacy/3945-rs.c
+++ b/drivers/net/wireless/iwlegacy/3945-rs.c
@@ -36,7 +36,7 @@
 
 #include <linux/workqueue.h>
 
-#include "iwl-commands.h"
+#include "commands.h"
 #include "3945.h"
 #include "iwl-sta.h"