ath10k: bitrate_mask add force_sgi support

Add force SGI support.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 1fc26fe..d1c5e7a 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -288,6 +288,7 @@
 
 	u8 fixed_rate;
 	u8 fixed_nss;
+	u8 force_sgi;
 };
 
 struct ath10k_vif_iter {