[9610] wlbt: Get around compilation error by using dummy value (Android P)

[9610] wlbt: Get around compilation error by using dummy value (Android P)

This needs proper fix as reqId is new parameter, presumably used to track each
scan request

drivers/net/wireless/scsc/cfg80211_ops.c: In function 'slsi_sched_scan_start':
drivers/net/wireless/scsc/cfg80211_ops.c:639:4: error: too few arguments to function 'cfg80211_sched_scan_stopped'
    cfg80211_sched_scan_stopped(wiphy);
    ^
In file included from drivers/net/wireless/scsc/cfg80211_ops.c:8:0:
./include/net/cfg80211.h:4623:6: note: declared here
 void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid);

Change-Id: I81174d7de5aa9825e538dca2923c29fd01eebcd6
SCSC-Bug-Id: SSB-40175
Signed-off-by: Tarun Karela <t.karela@samsung.com>