wifi: iwlwifi: mvm: use STA link address

For now we only support a single link, so just use the
deflink's address for the link address, instead of the
STA's (MLD) address, but use the link address anyway
in order to facilitate MLO connections.

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.c853c8ced3ba.I2e1915d1090c526e6a4c718440b45a7192bbbb03@changeid


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