iwlwifi: mvm: scan: enable adaptive dwell in p2p

Align to the requirement update and support adaptive dwell in p2p scan.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>