ath10k: use complete() instead complete_all()

There is only one waiter for the completion, therefore there
is no need to use complete_all(). Let's make that clear by
using complete() instead of complete_all().

The usage pattern of the completion is:

waiter context                          waker context

scan.started
------------

ath10k_start_scan()
  lockdep_assert_held(conf_mutex)
  auth10k_wmi_start_scan()
  wait_for_completion_timeout(scan.started)

					ath10k_wmi_event_scan_start_failed()
					  complete(scan.started)

					ath10k_wmi_event_scan_started()
					  complete(scan.started)

scan.completed
--------------

ath10k_scan_stop()
  lockdep_assert_held(conf_mutex)
  ath10k_wmi_stop_scan()
  wait_for_completion_timeout(scan.completed)

					__ath10k_scan_finish()
					  complete(scan.completed)

scan.on_channel
---------------

ath10k_remain_on_channel()
  mutex_lock(conf_mutex)
  ath10k_start_scan()
  wait_for_completion_timeout(scan.on_channel)

					ath10k_wmi_event_scan_foreign_chan()
					  complete(scan.on_channel)

offchan_tx_completed
--------------------

ath10k_offchan_tx_work()
  mutex_lock(conf_mutex)
  reinit_completion(offchan_tx_completed)
  wait_for_completion_timeout(offchan_tx_completed)

					ath10k_report_offchain_tx()
					  complete(offchan_tx_completed)

install_key_done
----------------
ath10k_install_key()
  lockep_assert_held(conf_mutex)
  reinit_completion(install_key_done)
  wait_for_completion_timeout(install_key_done)

				        ath10k_htt_t2h_msg_handler()
					  complete(install_key_done)

vdev_setup_done
---------------

ath10k_monitor_vdev_start()
  lockdep_assert_held(conf_mutex)
   reinit_completion(vdev_setup_done)
  ath10k_vdev_setup_sync()
    wait_for_completion_timeout(vdev_setup_done)

					ath10k_wmi_event_vdev_start_resp()
					  complete(vdev_setup_done)

ath10k_monitor_vdev_stop()
  lockdep_assert_held(conf_mutex)
  reinit_completion(vdev_setup_done()
  ath10k_vdev_setup_sync()
    wait_for_completion_timeout(vdev_setup_done)

					ath10k_wmi_event_vdev_stopped()
					 complete(vdev_setup_done)

thermal.wmi_sync
----------------
ath10k_thermal_show_temp()
  mutex_lock(conf_mutex)
  reinit_completion(thermal.wmi_sync)
  wait_for_completion_timeout(thermal.wmi_sync)

					ath10k_thermal_event_temperature()
					  complete(thermal.wmi_sync)

bss_survey_done
---------------
ath10k_mac_update_bss_chan_survey
  lockdep_assert_held(conf_mutex)
  reinit_completion(bss_survey_done)
  wait_for_completion_timeout(bss_survey_done)

					ath10k_wmi_event_pdev_bss_chan_info()
					  complete(bss_survey_done)

All complete() calls happen while the conf_mutex is taken. That means
at max one waiter is possible.

Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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