iwlwifi: mvm: remove support for legacy power API

If the driver detects old firmware, we disable support for
power management.
This greatly simplifies the code.

Reviewed-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --cc drivers/net/wireless/iwlwifi/mvm/Makefile
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/d3.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/debugfs.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/fw.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/mac80211.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/mvm.h
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/ops.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/power.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/power_legacy.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/mvm/utils.c
Simple merge