iwlegacy: merge common header files

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/commands.h b/drivers/net/wireless/iwlegacy/commands.h
index 82cf472..2f64ed3 100644
--- a/drivers/net/wireless/iwlegacy/commands.h
+++ b/drivers/net/wireless/iwlegacy/commands.h
@@ -3355,6 +3355,8 @@
  *
  *****************************************************************************/
 
+#define IL_RX_FRAME_SIZE_MSK	0x00003fff
+
 struct il_rx_pkt {
 	/*
 	 * The first 4 bytes of the RX frame header contain both the RX frame