iwlwifi: reset led_tpt when clear tx/rx traffic byte counts

LED blink rate is based on the traffic load, when tx/rx traffic counts
got reset, we also need to reset the led_tpt to prevent incorrect
blink rate being calculated.

Merge both clear_tx_statistics() and clear_rx_statistics() into
single clear_traffic_statistics() function, when reset the traffic byte
counts, both tx and rx need to be reset at the same time, to make
sure calculated the correct led blink rate.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 25a0e73..d61293a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -107,7 +107,8 @@
 		struct dentry *file_chain_noise;
 		struct dentry *file_tx_power;
 		struct dentry *file_power_save_status;
-		struct dentry *file_clear_statistics;
+		struct dentry *file_clear_ucode_statistics;
+		struct dentry *file_clear_traffic_statistics;
 	} dbgfs_debug_files;
 	u32 sram_offset;
 	u32 sram_len;