ath10k: document cycle count related counters

They are not necessarily named in an intuitive manner,
so at least add some comments to help the next person.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -201,10 +201,10 @@ struct ath10k_fw_stats_pdev {
 
 	/* PDEV stats */
 	s32 ch_noise_floor;
-	u32 tx_frame_count;
-	u32 rx_frame_count;
-	u32 rx_clear_count;
-	u32 cycle_count;
+	u32 tx_frame_count; /* Cycles spent transmitting frames */
+	u32 rx_frame_count; /* Cycles spent receiving frames */
+	u32 rx_clear_count; /* Total channel busy time, evidently */
+	u32 cycle_count; /* Total on-channel time */
 	u32 phy_err_count;
 	u32 chan_tx_power;
 	u32 ack_rx_bad;

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

@@ -4222,10 +4222,10 @@ struct wmi_10_2_stats_event {
  */
 struct wmi_pdev_stats_base {
 	__le32 chan_nf;
-	__le32 tx_frame_count;
-	__le32 rx_frame_count;
-	__le32 rx_clear_count;
-	__le32 cycle_count;
+	__le32 tx_frame_count; /* Cycles spent transmitting frames */
+	__le32 rx_frame_count; /* Cycles spent receiving frames */
+	__le32 rx_clear_count; /* Total channel busy time, evidently */
+	__le32 cycle_count; /* Total on-channel time */
 	__le32 phy_err_count;
 	__le32 chan_tx_pwr;
 } __packed;