ath10k: support ethtool stats

Add support for reading firmware stats through the ethtool
API.  This may be easier for applications to manipulate
compared to parsing a text based debugfs file.

kvalo: remove unneeded ifdefs, call ath10k_debug_fw_stats_request() and added
simple error handling

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath10k/debug.h b/drivers/net/wireless/ath/ath10k/debug.h
index efbcd29..d6a565d 100644
--- a/drivers/net/wireless/ath/ath10k/debug.h
+++ b/drivers/net/wireless/ath/ath10k/debug.h
@@ -63,6 +63,15 @@
 
 #define ATH10K_DFS_STAT_INC(ar, c) (ar->debug.dfs_stats.c++)
 
+void ath10k_debug_get_et_strings(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 u32 sset, u8 *data);
+int ath10k_debug_get_et_sset_count(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif, int sset);
+void ath10k_debug_get_et_stats(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif,
+			       struct ethtool_stats *stats, u64 *data);
+
 #else
 static inline int ath10k_debug_start(struct ath10k *ar)
 {
@@ -115,6 +124,10 @@
 
 #define ATH10K_DFS_STAT_INC(ar, c) do { } while (0)
 
+#define ath10k_debug_get_et_strings NULL
+#define ath10k_debug_get_et_sset_count NULL
+#define ath10k_debug_get_et_stats NULL
+
 #endif /* CONFIG_ATH10K_DEBUGFS */
 
 #ifdef CONFIG_ATH10K_DEBUG