wifi: iwlwifi: mvm: avoid sending MAC context for idle

If we change only idle, avoid sending the MAC context
command since it doesn't depend on idle state. This
also fixes an issue with the firmware because without
this we send the command during link switching, as we
just deactivated the first link, and we cannot send
this command when there's no active link.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230329100039.f5218f8453ec.I1325ff14ec07a27dd7ea2c1c210a1721d969839f@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>