wifi: iwlwifi: mvm: initiator: move setting target flags into a function

wifi: iwlwifi: mvm: initiator: move setting target flags into a function

Move setting the target flags into a dedicated function to support
different versions of the target struct.
This is done as preparation for moving to the new range request
version.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240527190228.9d22b61ce589.I7dbe596b4f677638d9a48c3f39b0826a9e35bea4@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>