P2P: Fix regression in start-GO/AP through a "fake" scan

P2P: Fix regression in start-GO/AP through a "fake" scan

Commit 3f9ebc439c9468bf51219c931a05028aa8a3d3a7 ('P2P: Allow AP/GO
interface to be started while P2P-in-progress') moved the
wpa_s->connect_without_scan and wpa_s->last_scan_req checks to an
earlier place within the wpa_supplicant_scan() function without
adjusting wpa_s->last_scan_req. This variable was set between the old
and new location, so the new location needs to use wpa_s->scan_req.

This fixes an issue where AP/GO operations were not properly started in
some operation sequence. Instead, a station mode scan was executed. This
issue could be triggered, e.g., by running the no_go_freq test case
followed by autogo_random_channel.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>