ath10k: add a condition to fill the LDPC capability correctly

The firmware advertises the LDPC support information for HT in
HT capability info in the wmi service ready event. To provide
granularity, firmware now advertises WMI_HT_CAP_RX_LDPC and
WMI_HT_CAP_TX_LDPC separately. To support LDPC, host should
also check for WMI_HT_CAP_RX_LDPC and WMI_HT_CAP_TX_LDPC in HT
capabilities.

Add a condition to existing logic in host to know whether firmware
supports LDPC or not.

Tested HW: WCN3990
Tested FW: WLAN.HL.3.1-00784-QCAHLSWMTPLZ-1,
           WLAN.HL.2.0-01617-QCAHLSWMTPLZ-1
Signed-off-by: Surabhi Vishnoi <svishnoi@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath10k/mac.c

@@ -4549,7 +4549,8 @@ static struct ieee80211_sta_ht_cap ath10k_get_ht_cap(struct ath10k *ar)
 		ht_cap.cap |= stbc;
 	}
 
-	if (ar->ht_cap_info & WMI_HT_CAP_LDPC)
+	if (ar->ht_cap_info & WMI_HT_CAP_LDPC || (ar->ht_cap_info &
+	    WMI_HT_CAP_RX_LDPC && (ar->ht_cap_info & WMI_HT_CAP_TX_LDPC)))
 		ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING;
 
 	if (ar->ht_cap_info & WMI_HT_CAP_L_SIG_TXOP_PROT)

drivers/net/wireless/ath/ath10k/wmi.h

@@ -2075,6 +2075,8 @@ enum wmi_channel_change_cause {
 #define WMI_HT_CAP_MPDU_DENSITY           0x0700   /* MPDU Density */
 #define WMI_HT_CAP_MPDU_DENSITY_MASK_SHIFT 8
 #define WMI_HT_CAP_HT40_SGI               0x0800
+#define WMI_HT_CAP_RX_LDPC                0x1000   /* LDPC RX support */
+#define WMI_HT_CAP_TX_LDPC                0x2000   /* LDPC TX support */
 
 #define WMI_HT_CAP_DEFAULT_ALL (WMI_HT_CAP_ENABLED       | \
 				WMI_HT_CAP_HT20_SGI      | \