iwlwifi: d3: disable dbg recording before entering D3

Currently the firmware does not stop recording debugging data when
entering D3 and this causes trouble (e.g. sporadic wake ups).

Fix that by stopping dbg recording when suspending.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/d3.c

@@ -1037,6 +1037,13 @@ static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 			cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
 #endif
 
+	/*
+	 * TODO: this is needed because the firmware is not stopping
+	 * the recording automatically before entering D3.  This can
+	 * be removed once the FW starts doing that.
+	 */
+	iwl_fw_dbg_stop_recording(&mvm->fwrt);
+
 	/* must be last -- this switches firmware state */
 	ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
 	if (ret)