ath10k: add hw rate definitions

Prepare defines for future use.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index 95df742..ef64f30 100644
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -25,6 +25,7 @@
 #include <net/mac80211.h>
 
 #include "htc.h"
+#include "hw.h"
 #include "rx_desc.h"
 #include "hw.h"